TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Šućurović, Katarina
AU  - Đuriš, Mihal
AU  - Arsenijević, Zorana
AU  - Krstić, Sanja
AU  - Bošković-Vragolović, Nevenka
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6806
AB  - In this work, the coefficient of fluid-wall mass transfer in an inverse fluidized bed was determined using the adsorption method. The experiments were carried out in a column with a diameter of 45 mm with spherical and non-spherical particles of polypropylene and polyethylene with a diameter of 3.3-4.9 mm and a density of about 930 kg m-3. A diluted solution of methylene blue was used as a fluidization medium, which was adsorbed on part of the surface of the column on silica gel. The obtained results showed that the presence of particles during inverse fluidization does not contribute significantly to mass transfer compared to the influence of particles on transfer in conventional fluidized beds. Therefore, the pseudofluid concept was introduced into the analysis and an empirical correlation was performed to determine the mass transfer coefficient. The obtained results were compared with literature correlations for inverse and conventional fluidized beds.
AB  - U ovom radu je određivan koeficijent prenosa mase fluid-zid u inverznofluidizovanom sloju primenom adsorpcione metode. Eksperimenti su vršeni u koloni  prečnika 45 mm sa sferičnim i nesferičnim česticama polipropilena i polietilena  prečnika 3.3-4.9 mm i gustine oko 930 kg m-3. Kao fluidizacioni medijum korišćen je  razblaženi rastvor metilenski plavog koji je adsorbovan na delu površine kolone na  silikagelu. Dobijeni rezultati pokazali su da prisustvo čestica pri inverznoj  fluidizaciji ne doprinosi značajno prenosu mase u poređenju sa uticajem čestica na  prenos mase u konvencionalno fluidizovanim slojevima. Zbog toga je u analizu uveden  koncept pseudofluida i izvedena je empirijska korelacija za određivanje koeficijenta  prenosa mase. Izvršeno je poređenje dobijenih rezultata sa literaturnim korelacijama za  inverznu i konvencionalnu fluidizacije.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Mass transfer in inverse fluidized beds
T1  - Prenos mase u inverzno fluidizovanom sloju
EP  - 919
IS  - 9
SP  - 905
VL  - 88
DO  - 10.2298/JSC230116016J
ER  - 

@article{
author = "Jaćimovski, Darko and Šućurović, Katarina and Đuriš, Mihal and Arsenijević, Zorana and Krstić, Sanja and Bošković-Vragolović, Nevenka",
year = "2023",
abstract = "In this work, the coefficient of fluid-wall mass transfer in an inverse fluidized bed was determined using the adsorption method. The experiments were carried out in a column with a diameter of 45 mm with spherical and non-spherical particles of polypropylene and polyethylene with a diameter of 3.3-4.9 mm and a density of about 930 kg m-3. A diluted solution of methylene blue was used as a fluidization medium, which was adsorbed on part of the surface of the column on silica gel. The obtained results showed that the presence of particles during inverse fluidization does not contribute significantly to mass transfer compared to the influence of particles on transfer in conventional fluidized beds. Therefore, the pseudofluid concept was introduced into the analysis and an empirical correlation was performed to determine the mass transfer coefficient. The obtained results were compared with literature correlations for inverse and conventional fluidized beds., U ovom radu je određivan koeficijent prenosa mase fluid-zid u inverznofluidizovanom sloju primenom adsorpcione metode. Eksperimenti su vršeni u koloni  prečnika 45 mm sa sferičnim i nesferičnim česticama polipropilena i polietilena  prečnika 3.3-4.9 mm i gustine oko 930 kg m-3. Kao fluidizacioni medijum korišćen je  razblaženi rastvor metilenski plavog koji je adsorbovan na delu površine kolone na  silikagelu. Dobijeni rezultati pokazali su da prisustvo čestica pri inverznoj  fluidizaciji ne doprinosi značajno prenosu mase u poređenju sa uticajem čestica na  prenos mase u konvencionalno fluidizovanim slojevima. Zbog toga je u analizu uveden  koncept pseudofluida i izvedena je empirijska korelacija za određivanje koeficijenta  prenosa mase. Izvršeno je poređenje dobijenih rezultata sa literaturnim korelacijama za  inverznu i konvencionalnu fluidizacije.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Mass transfer in inverse fluidized beds, Prenos mase u inverzno fluidizovanom sloju",
pages = "919-905",
number = "9",
volume = "88",
doi = "10.2298/JSC230116016J"
}

Jaćimovski, D., Šućurović, K., Đuriš, M., Arsenijević, Z., Krstić, S.,& Bošković-Vragolović, N.. (2023). Mass transfer in inverse fluidized beds. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 88(9), 905-919.
https://doi.org/10.2298/JSC230116016J

Jaćimovski D, Šućurović K, Đuriš M, Arsenijević Z, Krstić S, Bošković-Vragolović N. Mass transfer in inverse fluidized beds. in Journal of the Serbian Chemical Society. 2023;88(9):905-919.
doi:10.2298/JSC230116016J .

Jaćimovski, Darko, Šućurović, Katarina, Đuriš, Mihal, Arsenijević, Zorana, Krstić, Sanja, Bošković-Vragolović, Nevenka, "Mass transfer in inverse fluidized beds" in Journal of the Serbian Chemical Society, 88, no. 9 (2023):905-919,
https://doi.org/10.2298/JSC230116016J . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Brzić, Danica
AU  - Garić-Grulović, Radmila
AU  - Pjanović, Rada
AU  - Đuriš, Mihal
AU  - Arsenijević, Zorana
AU  - Bošković-Vragolović, Nevenka
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5064
AB  - In this work the theoretical model for heat transfer from a wall to a
liquid-solid fluidized bed by liquid convective mechanism has been proposed.
The model is based on thickness of boundary layer and film theory. The key
parameter in the model is the distance between two adjacent particles which
collide with the wall. According to the proposed model, the liquid convective
heat transfer in a fluidized bed is 4 to 5 times more intense than in a single-phase
flow. Additionally, the wall-to-bed heat transfer coefficient has been measured
experimentally in water –glass particles fluidized bed, for different particle sizes.
Comparison of the model prediction with experimental data has shown that size
of the particles strongly influences the mechanism of heat transfer. For fine
particles of 0.8 mm in diameter, the liquid convective heat transfer model
represents adequately the experimental data, indicating that particle convective
mechanism is negligible. For coarse particles of 1.5 - 2 mm in diameter, the
liquid convective heat transfer mechanism accounts for 60 % of the overall heat
transfer coefficient
AB  - У овом раду развијен је теоријски модел преноса топлоте конвективним механизмом
са зида колоне на течност у партикулативно флуидизованом слоју. Модел је заснован на
дебљини граничног слоја и теорији филма. Кључни параметар модела је растојање између
двe суседне честице које се сударају са зидом колоне. Према предложеном моделу пренос
топлоте конвекцијом на течност у флуидизованом слоју је 4 до 5 пута интензивнији него у
једнофазном току. Коефицијенти преноса топлоте су експериментално одређени у
флуидизованом слоју вода-стаклене сфере, за различите пречнике честица. Поређење
експерименталних резултата и предвиђања модела је показало да пречник честица значајно
утиче на механизам преноса топлоте. За веома ситне честице пречника 0.8 mm, модел
преноса топлоте конвекцијом на течност у потпуности репрезентује експерименталне
резултате, указујући да је пренос топлоте честицама занемарљив. За крупне честице,
пречника 1.5 -2 mm, конвективни пренос на течност чини 60 % од укупног коефицијента
преноса топлоте
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Heat transfer by liquid convection in particulate fluidized beds
T1  - ПРЕНОС ТОПЛОТЕ КОНВЕКТИВНИМ МЕХАНИЗМОМ У ПАРТИКУЛАТИВНО ФЛУИДИЗОВАНОМ СЛОЈУ
DO  - 10.2298/JSC211216020J
ER  - 

@article{
author = "Jaćimovski, Darko and Brzić, Danica and Garić-Grulović, Radmila and Pjanović, Rada and Đuriš, Mihal and Arsenijević, Zorana and Bošković-Vragolović, Nevenka",
year = "2022",
abstract = "In this work the theoretical model for heat transfer from a wall to a
liquid-solid fluidized bed by liquid convective mechanism has been proposed.
The model is based on thickness of boundary layer and film theory. The key
parameter in the model is the distance between two adjacent particles which
collide with the wall. According to the proposed model, the liquid convective
heat transfer in a fluidized bed is 4 to 5 times more intense than in a single-phase
flow. Additionally, the wall-to-bed heat transfer coefficient has been measured
experimentally in water –glass particles fluidized bed, for different particle sizes.
Comparison of the model prediction with experimental data has shown that size
of the particles strongly influences the mechanism of heat transfer. For fine
particles of 0.8 mm in diameter, the liquid convective heat transfer model
represents adequately the experimental data, indicating that particle convective
mechanism is negligible. For coarse particles of 1.5 - 2 mm in diameter, the
liquid convective heat transfer mechanism accounts for 60 % of the overall heat
transfer coefficient, У овом раду развијен је теоријски модел преноса топлоте конвективним механизмом
са зида колоне на течност у партикулативно флуидизованом слоју. Модел је заснован на
дебљини граничног слоја и теорији филма. Кључни параметар модела је растојање између
двe суседне честице које се сударају са зидом колоне. Према предложеном моделу пренос
топлоте конвекцијом на течност у флуидизованом слоју је 4 до 5 пута интензивнији него у
једнофазном току. Коефицијенти преноса топлоте су експериментално одређени у
флуидизованом слоју вода-стаклене сфере, за различите пречнике честица. Поређење
експерименталних резултата и предвиђања модела је показало да пречник честица значајно
утиче на механизам преноса топлоте. За веома ситне честице пречника 0.8 mm, модел
преноса топлоте конвекцијом на течност у потпуности репрезентује експерименталне
резултате, указујући да је пренос топлоте честицама занемарљив. За крупне честице,
пречника 1.5 -2 mm, конвективни пренос на течност чини 60 % од укупног коефицијента
преноса топлоте",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Heat transfer by liquid convection in particulate fluidized beds, ПРЕНОС ТОПЛОТЕ КОНВЕКТИВНИМ МЕХАНИЗМОМ У ПАРТИКУЛАТИВНО ФЛУИДИЗОВАНОМ СЛОЈУ",
doi = "10.2298/JSC211216020J"
}

Jaćimovski, D., Brzić, D., Garić-Grulović, R., Pjanović, R., Đuriš, M., Arsenijević, Z.,& Bošković-Vragolović, N.. (2022). Heat transfer by liquid convection in particulate fluidized beds. in Journal of the Serbian Chemical Society
Serbian Chemical Society..
https://doi.org/10.2298/JSC211216020J

Jaćimovski D, Brzić D, Garić-Grulović R, Pjanović R, Đuriš M, Arsenijević Z, Bošković-Vragolović N. Heat transfer by liquid convection in particulate fluidized beds. in Journal of the Serbian Chemical Society. 2022;.
doi:10.2298/JSC211216020J .

Jaćimovski, Darko, Brzić, Danica, Garić-Grulović, Radmila, Pjanović, Rada, Đuriš, Mihal, Arsenijević, Zorana, Bošković-Vragolović, Nevenka, "Heat transfer by liquid convection in particulate fluidized beds" in Journal of the Serbian Chemical Society (2022),
https://doi.org/10.2298/JSC211216020J . .

TY  - CONF
AU  - Kaluđerović-Radoičić, Tatjana
AU  - Đuriš, Mihal
AU  - Jaćimovski, Darko
AU  - Arsenijević, Zorana
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4190
AB  - In this paper, experimental investigation of the dynamics of the process of fluidized bed granulation was performed, in order to find optimal process conditions and binder concentration to achieve the desired granules development. The experiments were performed in batch system using corn flour as starting material. Ten experiments were performed in which sucrose solution of different concentrations (20, 30, 35 and 40 %) was used as binder. The temperature of the system was kept constant during the granulation process and amounted to 40-50°C. Samples were taken from the fluidized bed at time intervals of 3 min. The dynamics of granulation was examined by determining three different factors (bulk density, moisure content and particle size distribution) for each of the samples. It has been found that bulk density continuously decreases during the granulation process, while in the drying phase it remains constant. Particle size distribution has shown that the average diameter of the projected surface increases uniformly during the process. By comparing all of the three investigated factors, it was shown that the best quality of granules is achieved using 35 % sucrose solution .
AB  - U ovom radu izvršeno je eksperimentalno ispitivanje procesa mokre granulacije u fluidizovanom sloju u cilju pronalaženja optimalnih uslova izvođenja procesa i sastava veziva kojim će se ostvariti željena dinamika razvoja granula. Ispitivanje je izvršeno u šaržnom sistemu, a korišćeno je kukuruzno brašno kao polazni materijal. Izvršeno je 10 eksperimenata u kojima je kao vezivno sredstvo korišćen rastvor saharoze različitih koncentracija: 20, 30, 35 i 40 %. Temperatura je održavana konstantnom tokom procesa granulacije i iznosila je 40-50C. Uzorci su iz sloja uzimani u jednakim vremenskim intervalima od 3 min. Dinamika granulacije ispitivana je određivanjem tri različita faktora (nasipne gustina, vlažnosti i raspodele veličine čestica) za svaki od uzoraka. Utvrđeno je da nasipna gustina kontinualno opada tokom izvođenja procesa granulacije, dok u fazi sušenja ostaje konstantna. Raspodela veličina čestica je pokazala da srednji prečnik projektovane površine ravnomerno raste tokom procesa. Poređenjem sva tri ispitivana faktora pokazano je da se najbolji kvalitet granula postiže korišćenjem 35 % rastvora saharoze kao vezivnog sredstva.
PB  - Serbian Chemical Society, Belgrade
C3  - 56th Meeting of the Serbian chemical Society - Proceedings
T1  - Investigation of the dynamics of fluidized bed granulation process
T1  - Ispitivanje dinamike granulacije praškastih materijala u fluidizovanom sloju
EP  - 59
SP  - 55
UR  - https://hdl.handle.net/21.15107/rcub_technorep_4190
ER  - 

@conference{
author = "Kaluđerović-Radoičić, Tatjana and Đuriš, Mihal and Jaćimovski, Darko and Arsenijević, Zorana",
year = "2019",
abstract = "In this paper, experimental investigation of the dynamics of the process of fluidized bed granulation was performed, in order to find optimal process conditions and binder concentration to achieve the desired granules development. The experiments were performed in batch system using corn flour as starting material. Ten experiments were performed in which sucrose solution of different concentrations (20, 30, 35 and 40 %) was used as binder. The temperature of the system was kept constant during the granulation process and amounted to 40-50°C. Samples were taken from the fluidized bed at time intervals of 3 min. The dynamics of granulation was examined by determining three different factors (bulk density, moisure content and particle size distribution) for each of the samples. It has been found that bulk density continuously decreases during the granulation process, while in the drying phase it remains constant. Particle size distribution has shown that the average diameter of the projected surface increases uniformly during the process. By comparing all of the three investigated factors, it was shown that the best quality of granules is achieved using 35 % sucrose solution ., U ovom radu izvršeno je eksperimentalno ispitivanje procesa mokre granulacije u fluidizovanom sloju u cilju pronalaženja optimalnih uslova izvođenja procesa i sastava veziva kojim će se ostvariti željena dinamika razvoja granula. Ispitivanje je izvršeno u šaržnom sistemu, a korišćeno je kukuruzno brašno kao polazni materijal. Izvršeno je 10 eksperimenata u kojima je kao vezivno sredstvo korišćen rastvor saharoze različitih koncentracija: 20, 30, 35 i 40 %. Temperatura je održavana konstantnom tokom procesa granulacije i iznosila je 40-50C. Uzorci su iz sloja uzimani u jednakim vremenskim intervalima od 3 min. Dinamika granulacije ispitivana je određivanjem tri različita faktora (nasipne gustina, vlažnosti i raspodele veličine čestica) za svaki od uzoraka. Utvrđeno je da nasipna gustina kontinualno opada tokom izvođenja procesa granulacije, dok u fazi sušenja ostaje konstantna. Raspodela veličina čestica je pokazala da srednji prečnik projektovane površine ravnomerno raste tokom procesa. Poređenjem sva tri ispitivana faktora pokazano je da se najbolji kvalitet granula postiže korišćenjem 35 % rastvora saharoze kao vezivnog sredstva.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "56th Meeting of the Serbian chemical Society - Proceedings",
title = "Investigation of the dynamics of fluidized bed granulation process, Ispitivanje dinamike granulacije praškastih materijala u fluidizovanom sloju",
pages = "59-55",
url = "https://hdl.handle.net/21.15107/rcub_technorep_4190"
}

Kaluđerović-Radoičić, T., Đuriš, M., Jaćimovski, D.,& Arsenijević, Z.. (2019). Investigation of the dynamics of fluidized bed granulation process. in 56th Meeting of the Serbian chemical Society - Proceedings
Serbian Chemical Society, Belgrade., 55-59.
https://hdl.handle.net/21.15107/rcub_technorep_4190

Kaluđerović-Radoičić T, Đuriš M, Jaćimovski D, Arsenijević Z. Investigation of the dynamics of fluidized bed granulation process. in 56th Meeting of the Serbian chemical Society - Proceedings. 2019;:55-59.
https://hdl.handle.net/21.15107/rcub_technorep_4190 .

Kaluđerović-Radoičić, Tatjana, Đuriš, Mihal, Jaćimovski, Darko, Arsenijević, Zorana, "Investigation of the dynamics of fluidized bed granulation process" in 56th Meeting of the Serbian chemical Society - Proceedings (2019):55-59,
https://hdl.handle.net/21.15107/rcub_technorep_4190 .

TY  - CONF
AU  - Kaluđerović-Radoičić, Tatjana
AU  - Đuriš, Mihal
AU  - Jaćimovski, Darko
AU  - Arsenijević, Zorana
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4188
AB  - In this paper, experimental investigation of the dynamics of the process of fluidized bed granulation was performed, in order to find optimal process conditions and binder concentration to achieve the desired granules development. The experiments were performed in batch system using corn flour as starting material. Ten experiments were performed in which sucrose solution of different concentrations (20, 30, 35 and 40 %) was used as binder. The temperature of the system was kept constant during the granulation process and amounted to 40-50°C. Samples were taken from the fluidized bed at time intervals of 3 min. The dynamics of granulation was examined by determining three different factors (bulk density, moisure content and particle size distribution) for each of the samples. It has been found that bulk density continuously decreases during the granulation process, while in the drying phase it remains constant. Particle size distribution has shown that the average diameter of the projected surface increases uniformly during the process. By comparing all of the three investigated factors, it was shown that the best quality of granules is achieved using 35 % sucrose solution .
AB  - U ovom radu izvršeno je eksperimentalno ispitivanje procesa mokre granulacije u fluidizovanom sloju u cilju pronalaženja optimalnih uslova izvođenja procesa i sastava veziva kojim će se ostvariti željena dinamika razvoja granula. Ispitivanje je izvršeno u šaržnom sistemu, a korišćeno je kukuruzno brašno kao polazni materijal. Izvršeno je 10 eksperimenata u kojima je kao vezivno sredstvo korišćen rastvor saharoze različitih koncentracija: 20, 30, 35 i 40 %. Temperatura je održavana konstantnom tokom procesa granulacije i iznosila je 40-50C. Uzorci su iz sloja uzimani u jednakim vremenskim intervalima od 3 min. Dinamika granulacije ispitivana je određivanjem tri različita faktora (nasipne gustina, vlažnosti i raspodele veličine čestica) za svaki od uzoraka. Utvrđeno je da nasipna gustina kontinualno opada tokom izvođenja procesa granulacije, dok u fazi sušenja ostaje konstantna. Raspodela veličina čestica je pokazala da srednji prečnik projektovane površine ravnomerno raste tokom procesa. Poređenjem sva tri ispitivana faktora pokazano je da se najbolji kvalitet granula postiže korišćenjem 35 % rastvora saharoze kao vezivnog sredstva.
PB  - Serbian Chemical Society, Belgrade
C3  - 56th Meeting of the Serbian chemical Society - Book of Abstracts
T1  - Investigation of the dynamics of fluidized bed granulation process
T1  - Ispitivanje dinamike granulacije praškastih materijala u fluidizovanom sloju
SP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_technorep_4188
ER  - 

@conference{
author = "Kaluđerović-Radoičić, Tatjana and Đuriš, Mihal and Jaćimovski, Darko and Arsenijević, Zorana",
year = "2019",
abstract = "In this paper, experimental investigation of the dynamics of the process of fluidized bed granulation was performed, in order to find optimal process conditions and binder concentration to achieve the desired granules development. The experiments were performed in batch system using corn flour as starting material. Ten experiments were performed in which sucrose solution of different concentrations (20, 30, 35 and 40 %) was used as binder. The temperature of the system was kept constant during the granulation process and amounted to 40-50°C. Samples were taken from the fluidized bed at time intervals of 3 min. The dynamics of granulation was examined by determining three different factors (bulk density, moisure content and particle size distribution) for each of the samples. It has been found that bulk density continuously decreases during the granulation process, while in the drying phase it remains constant. Particle size distribution has shown that the average diameter of the projected surface increases uniformly during the process. By comparing all of the three investigated factors, it was shown that the best quality of granules is achieved using 35 % sucrose solution ., U ovom radu izvršeno je eksperimentalno ispitivanje procesa mokre granulacije u fluidizovanom sloju u cilju pronalaženja optimalnih uslova izvođenja procesa i sastava veziva kojim će se ostvariti željena dinamika razvoja granula. Ispitivanje je izvršeno u šaržnom sistemu, a korišćeno je kukuruzno brašno kao polazni materijal. Izvršeno je 10 eksperimenata u kojima je kao vezivno sredstvo korišćen rastvor saharoze različitih koncentracija: 20, 30, 35 i 40 %. Temperatura je održavana konstantnom tokom procesa granulacije i iznosila je 40-50C. Uzorci su iz sloja uzimani u jednakim vremenskim intervalima od 3 min. Dinamika granulacije ispitivana je određivanjem tri različita faktora (nasipne gustina, vlažnosti i raspodele veličine čestica) za svaki od uzoraka. Utvrđeno je da nasipna gustina kontinualno opada tokom izvođenja procesa granulacije, dok u fazi sušenja ostaje konstantna. Raspodela veličina čestica je pokazala da srednji prečnik projektovane površine ravnomerno raste tokom procesa. Poređenjem sva tri ispitivana faktora pokazano je da se najbolji kvalitet granula postiže korišćenjem 35 % rastvora saharoze kao vezivnog sredstva.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "56th Meeting of the Serbian chemical Society - Book of Abstracts",
title = "Investigation of the dynamics of fluidized bed granulation process, Ispitivanje dinamike granulacije praškastih materijala u fluidizovanom sloju",
pages = "36",
url = "https://hdl.handle.net/21.15107/rcub_technorep_4188"
}

Kaluđerović-Radoičić, T., Đuriš, M., Jaćimovski, D.,& Arsenijević, Z.. (2019). Investigation of the dynamics of fluidized bed granulation process. in 56th Meeting of the Serbian chemical Society - Book of Abstracts
Serbian Chemical Society, Belgrade., 36.
https://hdl.handle.net/21.15107/rcub_technorep_4188

Kaluđerović-Radoičić T, Đuriš M, Jaćimovski D, Arsenijević Z. Investigation of the dynamics of fluidized bed granulation process. in 56th Meeting of the Serbian chemical Society - Book of Abstracts. 2019;:36.
https://hdl.handle.net/21.15107/rcub_technorep_4188 .

Kaluđerović-Radoičić, Tatjana, Đuriš, Mihal, Jaćimovski, Darko, Arsenijević, Zorana, "Investigation of the dynamics of fluidized bed granulation process" in 56th Meeting of the Serbian chemical Society - Book of Abstracts (2019):36,
https://hdl.handle.net/21.15107/rcub_technorep_4188 .

TY  - JOUR
AU  - Đuriš, Mihal
AU  - Kaluđerović-Radoičić, Tatjana
AU  - Jaćimovski, Darko
AU  - Arsenijević, Zorana
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4083
AB  - In this paper, an innovative fluidized bed dryer with inert particles is presented. The system can be used for drying of solutions, suspensions and pastes in order to obtain a powdered product. The experiments were performed in a pilot-scale dryer with a cylindrical column 0.215 m in diameter and 1.2 mm height, with glass spheres as inert particles. The material used for drying was CuSO4 solution. The effects of operating conditions on the dryer throughput and product quality were investigated. Main performance criteria, i.e. specific water evaporation rate, specific heat consumption and specific air consumption, were quantified. Nearly isothermal conditions were found due to thorough mixing of the particles. The energy efficiency of the dryer was also assessed. Simple heat and mass balances predicted the dryer performance quite well.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - High Efficiency Disperse Dryer - an innovative process for drying of solutions, suspensions and pastes in a fluidized bed of inert particles
EP  - 222
IS  - 4
SP  - 213
VL  - 73
DO  - 10.2298/HEMIND190626021D
ER  - 

@article{
author = "Đuriš, Mihal and Kaluđerović-Radoičić, Tatjana and Jaćimovski, Darko and Arsenijević, Zorana",
year = "2019",
abstract = "In this paper, an innovative fluidized bed dryer with inert particles is presented. The system can be used for drying of solutions, suspensions and pastes in order to obtain a powdered product. The experiments were performed in a pilot-scale dryer with a cylindrical column 0.215 m in diameter and 1.2 mm height, with glass spheres as inert particles. The material used for drying was CuSO4 solution. The effects of operating conditions on the dryer throughput and product quality were investigated. Main performance criteria, i.e. specific water evaporation rate, specific heat consumption and specific air consumption, were quantified. Nearly isothermal conditions were found due to thorough mixing of the particles. The energy efficiency of the dryer was also assessed. Simple heat and mass balances predicted the dryer performance quite well.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "High Efficiency Disperse Dryer - an innovative process for drying of solutions, suspensions and pastes in a fluidized bed of inert particles",
pages = "222-213",
number = "4",
volume = "73",
doi = "10.2298/HEMIND190626021D"
}

Đuriš, M., Kaluđerović-Radoičić, T., Jaćimovski, D.,& Arsenijević, Z.. (2019). High Efficiency Disperse Dryer - an innovative process for drying of solutions, suspensions and pastes in a fluidized bed of inert particles. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 73(4), 213-222.
https://doi.org/10.2298/HEMIND190626021D

Đuriš M, Kaluđerović-Radoičić T, Jaćimovski D, Arsenijević Z. High Efficiency Disperse Dryer - an innovative process for drying of solutions, suspensions and pastes in a fluidized bed of inert particles. in Hemijska industrija. 2019;73(4):213-222.
doi:10.2298/HEMIND190626021D .

Đuriš, Mihal, Kaluđerović-Radoičić, Tatjana, Jaćimovski, Darko, Arsenijević, Zorana, "High Efficiency Disperse Dryer - an innovative process for drying of solutions, suspensions and pastes in a fluidized bed of inert particles" in Hemijska industrija, 73, no. 4 (2019):213-222,
https://doi.org/10.2298/HEMIND190626021D . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Garić-Grulović, Radmila
AU  - Vucetić, Nemanja
AU  - Pjanović, Rada
AU  - Bošković-Vragolović, Nevenka
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3337
AB  - The aim of this study was to analyze the concentration boundary layer for a comprehensive description of the mass transfer in systems with fluidized particles. Mass transfer from the wall of the column to the fluid in the presence of inert fluidized particles was experimentally investigated using the dissolution method. Experiments were carried out in a column 34 mm in diameter, divided by height into six segments. In all runs, mass transfer rates were determined in the presence of fluidized spherical glass particles 1.10 mm, 1.94 mm and 2.98 mm in diameter, using water as the fluidized medium. The analysis of the boundary layer shows the effect of particles presence on mass transfer in fluidized systems. The theoretical model was established based on boundary layer theory, and the impact of particles on the shortening of the boundary layer length, due to their collision with the wall of the column. The theoretically derived model was compared with experimentally obtained data and with data calculated from available literature correlations. Very good agreement was found between the model, experimental data, and published correlations (especially the correlation by Pickett et al. 12]).
PB  - Elsevier Science Bv, Amsterdam
T2  - Powder Technology
T1  - Mass transfer and concentration boundary layer in a particulate fluidized bed
EP  - 75
SP  - 68
VL  - 303
DO  - 10.1016/j.powtec.2016.09.025
ER  - 

@article{
author = "Jaćimovski, Darko and Garić-Grulović, Radmila and Vucetić, Nemanja and Pjanović, Rada and Bošković-Vragolović, Nevenka",
year = "2016",
abstract = "The aim of this study was to analyze the concentration boundary layer for a comprehensive description of the mass transfer in systems with fluidized particles. Mass transfer from the wall of the column to the fluid in the presence of inert fluidized particles was experimentally investigated using the dissolution method. Experiments were carried out in a column 34 mm in diameter, divided by height into six segments. In all runs, mass transfer rates were determined in the presence of fluidized spherical glass particles 1.10 mm, 1.94 mm and 2.98 mm in diameter, using water as the fluidized medium. The analysis of the boundary layer shows the effect of particles presence on mass transfer in fluidized systems. The theoretical model was established based on boundary layer theory, and the impact of particles on the shortening of the boundary layer length, due to their collision with the wall of the column. The theoretically derived model was compared with experimentally obtained data and with data calculated from available literature correlations. Very good agreement was found between the model, experimental data, and published correlations (especially the correlation by Pickett et al. 12]).",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Powder Technology",
title = "Mass transfer and concentration boundary layer in a particulate fluidized bed",
pages = "75-68",
volume = "303",
doi = "10.1016/j.powtec.2016.09.025"
}

Jaćimovski, D., Garić-Grulović, R., Vucetić, N., Pjanović, R.,& Bošković-Vragolović, N.. (2016). Mass transfer and concentration boundary layer in a particulate fluidized bed. in Powder Technology
Elsevier Science Bv, Amsterdam., 303, 68-75.
https://doi.org/10.1016/j.powtec.2016.09.025

Jaćimovski D, Garić-Grulović R, Vucetić N, Pjanović R, Bošković-Vragolović N. Mass transfer and concentration boundary layer in a particulate fluidized bed. in Powder Technology. 2016;303:68-75.
doi:10.1016/j.powtec.2016.09.025 .

Jaćimovski, Darko, Garić-Grulović, Radmila, Vucetić, Nemanja, Pjanović, Rada, Bošković-Vragolović, Nevenka, "Mass transfer and concentration boundary layer in a particulate fluidized bed" in Powder Technology, 303 (2016):68-75,
https://doi.org/10.1016/j.powtec.2016.09.025 . .

TY  - JOUR
AU  - Đuriš, Mihal
AU  - Arsenijević, Zorana
AU  - Jaćimovski, Darko
AU  - Kaluđerović-Radoičić, Tatjana
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3306
AB  - In this paper, the influence of different scanning resolutions and the use of image analysis softwares for the image analysis, SigmaScan Pro, Image) and Matlab, on size and shape factors commonly used in particles characterization were investigated. In our previous paper [1] the characterization of polydisperse sand particles was performed, and the need had arisen to examine the impact of different scanning resolutions on shape factors in more detail. The particles analyzed were the polydisperse fractions of quartz filtration sand with sieve diameters in the intervals of 0.85-1.030 mm, 1.406-1.600 mm and 2.00-2.83 mm. The particles size and shape were analyzed using the scanned image of about 150 particles in each fraction. In addition, the images of circles of similar dimensions were generated to serve as reference particles. The scanning resolutions used in this study were from 75 to 4800 dpi, and grayscale thresholds were optimized for discrimination of the particles from the background. The obtained results indicate that the resolution (i.e. the pixel size) and the algorithms used in image analysis softwares have significant influence on the obtained shape factors. The most significant effect was observed in the calculated values of the particles perimeters, while the effect was less pronounced in the results obtained for the particles projected area. The analysis of images of generated circles confirmed that the resolution had the largest effect on particle perimeter. The use of the resolutions of 300-600 dpi for the determination of particle shape and size can be recommended for particles of similar to 1 mm and larger, because of reasonable results, low storage space and less time for image analysis.
PB  - Elsevier, Amsterdam
T2  - Powder Technology
T1  - Optimal pixel resolution for sand particles size and shape analysis
EP  - 186
SP  - 177
VL  - 302
DO  - 10.1016/j.powtec.2016.08.045
ER  - 

@article{
author = "Đuriš, Mihal and Arsenijević, Zorana and Jaćimovski, Darko and Kaluđerović-Radoičić, Tatjana",
year = "2016",
abstract = "In this paper, the influence of different scanning resolutions and the use of image analysis softwares for the image analysis, SigmaScan Pro, Image) and Matlab, on size and shape factors commonly used in particles characterization were investigated. In our previous paper [1] the characterization of polydisperse sand particles was performed, and the need had arisen to examine the impact of different scanning resolutions on shape factors in more detail. The particles analyzed were the polydisperse fractions of quartz filtration sand with sieve diameters in the intervals of 0.85-1.030 mm, 1.406-1.600 mm and 2.00-2.83 mm. The particles size and shape were analyzed using the scanned image of about 150 particles in each fraction. In addition, the images of circles of similar dimensions were generated to serve as reference particles. The scanning resolutions used in this study were from 75 to 4800 dpi, and grayscale thresholds were optimized for discrimination of the particles from the background. The obtained results indicate that the resolution (i.e. the pixel size) and the algorithms used in image analysis softwares have significant influence on the obtained shape factors. The most significant effect was observed in the calculated values of the particles perimeters, while the effect was less pronounced in the results obtained for the particles projected area. The analysis of images of generated circles confirmed that the resolution had the largest effect on particle perimeter. The use of the resolutions of 300-600 dpi for the determination of particle shape and size can be recommended for particles of similar to 1 mm and larger, because of reasonable results, low storage space and less time for image analysis.",
publisher = "Elsevier, Amsterdam",
journal = "Powder Technology",
title = "Optimal pixel resolution for sand particles size and shape analysis",
pages = "186-177",
volume = "302",
doi = "10.1016/j.powtec.2016.08.045"
}

Đuriš, M., Arsenijević, Z., Jaćimovski, D.,& Kaluđerović-Radoičić, T.. (2016). Optimal pixel resolution for sand particles size and shape analysis. in Powder Technology
Elsevier, Amsterdam., 302, 177-186.
https://doi.org/10.1016/j.powtec.2016.08.045

Đuriš M, Arsenijević Z, Jaćimovski D, Kaluđerović-Radoičić T. Optimal pixel resolution for sand particles size and shape analysis. in Powder Technology. 2016;302:177-186.
doi:10.1016/j.powtec.2016.08.045 .

Đuriš, Mihal, Arsenijević, Zorana, Jaćimovski, Darko, Kaluđerović-Radoičić, Tatjana, "Optimal pixel resolution for sand particles size and shape analysis" in Powder Technology, 302 (2016):177-186,
https://doi.org/10.1016/j.powtec.2016.08.045 . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Garić-Grulović, Radmila
AU  - Pjanović, Rada
AU  - Bošković-Vragolović, Nevenka
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2878
AB  - This paper presents the results of an experimental investigation of the mass transfer between the column wall and fluidized bed without and with fast, irreversible chemical reaction. Experiments were performed in the column 34 mm in diameter with inner channel filled with benzoic acid. The inert, spherical, glass particles with diameter of 1.94 mm were used as fluidized bed and the fluidization medium was aqueous solution of sodium hydroxide. In order to obtain a clear result of the impact of particles on the intensity of the mass transfer, experiments with and without chemical reaction are also done in systems without particles. The value of the enhancement factor of the mass transfer coefficient due to the presence of chemical reactions was found using experimental results. It was shown that the influence of the particles presence and the effect of chemical reactions have additive character on the mass transfer. The chemical reaction in systems without particles increases mass transfer coefficients 20 times, while the presence of fluidized particles increases the mass transfer coefficients 28 times. Obtained results showed good agreement with literature correlations. In order to establish analogies between momentum and mass transfer in a fluidized bed, with chemical reaction, experimental results are also presented.
PB  - 8th International Symposium on Turbulence, Heat and Mass Transfer, THMT 2015
T2  - Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer
T1  - Mass transfer without and with chemical reaction in particulate fluidized beds
EP  - 874
SP  - 871
VL  - 0
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2878
ER  - 

@article{
author = "Jaćimovski, Darko and Garić-Grulović, Radmila and Pjanović, Rada and Bošković-Vragolović, Nevenka",
year = "2015",
abstract = "This paper presents the results of an experimental investigation of the mass transfer between the column wall and fluidized bed without and with fast, irreversible chemical reaction. Experiments were performed in the column 34 mm in diameter with inner channel filled with benzoic acid. The inert, spherical, glass particles with diameter of 1.94 mm were used as fluidized bed and the fluidization medium was aqueous solution of sodium hydroxide. In order to obtain a clear result of the impact of particles on the intensity of the mass transfer, experiments with and without chemical reaction are also done in systems without particles. The value of the enhancement factor of the mass transfer coefficient due to the presence of chemical reactions was found using experimental results. It was shown that the influence of the particles presence and the effect of chemical reactions have additive character on the mass transfer. The chemical reaction in systems without particles increases mass transfer coefficients 20 times, while the presence of fluidized particles increases the mass transfer coefficients 28 times. Obtained results showed good agreement with literature correlations. In order to establish analogies between momentum and mass transfer in a fluidized bed, with chemical reaction, experimental results are also presented.",
publisher = "8th International Symposium on Turbulence, Heat and Mass Transfer, THMT 2015",
journal = "Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer",
title = "Mass transfer without and with chemical reaction in particulate fluidized beds",
pages = "874-871",
volume = "0",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2878"
}

Jaćimovski, D., Garić-Grulović, R., Pjanović, R.,& Bošković-Vragolović, N.. (2015). Mass transfer without and with chemical reaction in particulate fluidized beds. in Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer
8th International Symposium on Turbulence, Heat and Mass Transfer, THMT 2015., 0, 871-874.
https://hdl.handle.net/21.15107/rcub_technorep_2878

Jaćimovski D, Garić-Grulović R, Pjanović R, Bošković-Vragolović N. Mass transfer without and with chemical reaction in particulate fluidized beds. in Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer. 2015;0:871-874.
https://hdl.handle.net/21.15107/rcub_technorep_2878 .

Jaćimovski, Darko, Garić-Grulović, Radmila, Pjanović, Rada, Bošković-Vragolović, Nevenka, "Mass transfer without and with chemical reaction in particulate fluidized beds" in Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer, 0 (2015):871-874,
https://hdl.handle.net/21.15107/rcub_technorep_2878 .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Garić-Grulović, Radmila
AU  - Grbavčić, Željko
AU  - Bošković-Vragolović, Nevenka
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2971
AB  - Wall-to-bed heat transfer in particulate fluidized beds of spherical particles was studied. Experiments were performed using spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. copper tube equipped with a steam jacket. Heat transfer data related to the fluid-particle interphase drag coefficient were obtained and compared with previous results for wall-to-bed mass transfer in fluidized beds [Bogkovit et aL, Powder Technol., 79 (1994) 217]. All the data for momentum, heat and mass transfer in particulate fluidized beds of spherical particles, showed the existence of an analogy among these three phenomena.
PB  - Elsevier Science Bv, Amsterdam
T2  - Powder Technology
T1  - Analogy between momentum and heat transfer in liquid-solid fluidized beds
EP  - 216
SP  - 213
VL  - 274
DO  - 10.1016/j.powtec.2014.11.010
ER  - 

@article{
author = "Jaćimovski, Darko and Garić-Grulović, Radmila and Grbavčić, Željko and Bošković-Vragolović, Nevenka",
year = "2015",
abstract = "Wall-to-bed heat transfer in particulate fluidized beds of spherical particles was studied. Experiments were performed using spherical glass particles of 0.80-2.98 mm in diameter with water in a 25.4 mm I.D. copper tube equipped with a steam jacket. Heat transfer data related to the fluid-particle interphase drag coefficient were obtained and compared with previous results for wall-to-bed mass transfer in fluidized beds [Bogkovit et aL, Powder Technol., 79 (1994) 217]. All the data for momentum, heat and mass transfer in particulate fluidized beds of spherical particles, showed the existence of an analogy among these three phenomena.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Powder Technology",
title = "Analogy between momentum and heat transfer in liquid-solid fluidized beds",
pages = "216-213",
volume = "274",
doi = "10.1016/j.powtec.2014.11.010"
}

Jaćimovski, D., Garić-Grulović, R., Grbavčić, Ž.,& Bošković-Vragolović, N.. (2015). Analogy between momentum and heat transfer in liquid-solid fluidized beds. in Powder Technology
Elsevier Science Bv, Amsterdam., 274, 213-216.
https://doi.org/10.1016/j.powtec.2014.11.010

Jaćimovski D, Garić-Grulović R, Grbavčić Ž, Bošković-Vragolović N. Analogy between momentum and heat transfer in liquid-solid fluidized beds. in Powder Technology. 2015;274:213-216.
doi:10.1016/j.powtec.2014.11.010 .

Jaćimovski, Darko, Garić-Grulović, Radmila, Grbavčić, Željko, Bošković-Vragolović, Nevenka, "Analogy between momentum and heat transfer in liquid-solid fluidized beds" in Powder Technology, 274 (2015):213-216,
https://doi.org/10.1016/j.powtec.2014.11.010 . .

TY  - JOUR
AU  - Jaćimovski, Darko
AU  - Garić-Grulović, Radmila
AU  - Grbavčić, Željko
AU  - Đuriš, Mihal
AU  - Bošković-Vragolović, Nevenka
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2645
AB  - Wall-to-bed momentum, heat and mass transfer in the vertical liquid-solids flow, as well as in the single phase flow, were studied. The aim of this investigation was to establish the analogy among those phenomena. Also, effect of particle concentration on momentum, heat and mass transfer was studied. The experiments in hydraulic transport were performed in 25.4 mm I.D. cooper tube equipped with a steam jacket, using spherical glass particles of 1.94 mm in diameter and water as a transport fluid. The segment of the transport tube used for mass transfer measurements had internal coating made of benzoic acid. In the hydraulic transport two characteristic flow regimes were observed: turbulent and parallel particle flow regime. The transition between two characteristic regimes (Y* = 0), occurs at a critical voidage ε ≈ 0.85. The vertical two-phase flow was con­sidered as the pseudofluid, and modified mixture-wall friction coefficient (fw) and modified mixture Reynolds number (Rem) were introduced for system characterization. Experimental data show that the wall-to-bed momentum, heat and mass transfer coefficients, in vertical flow of pseudofluid, for the turbulent regime are significantly higher than in parallel regime. Wall-to-bed, mass and heat transfer coefficients in hydraulic transport of particles were much higher than in single-phase flow for lower Reynolds numbers (Re  lt  15000), while for high Reynolds numbers (Re  gt  15000), there was not significant difference. The experimental data for wall-to-bed momentum, heat and mass transfer in vertical flow of pseudofluid in parallel particle flow regime, verify analogy among these three phenomena.
AB  - U ovom radu prikazani su rezultati eksperimentalnih ispitivanja prenosa količine kretanja, toplote i mase zid-fluid u vertikalnom hidrauličkom transportu inertnih čestica i pri strujanju fluida u cevi istog prečnika. Eksperimentalna ispitivanja vršena su istovremenim merenjem potrebnih parametara za definisanje navedenih prenosa. Cilj ovih ispitivanja bio je određivanje koeficijenata prenosa pri vertikalnom hidrauličkom transportu inertnih čestica i uspostavljanje analogije tri prenosa. Eksperimentalni sistem predstavljala je vertikalna transportna cev prečnika 25,4 mm snabdevena omotačem za zagrevanje parom, kao i segmentom transportne cevi prepariranim rastopom benzoeve kiseline. Kao fluid korišćena je voda, a vršen je transport staklenih sfernih čestica prečnika 1,94 mm. U rezultatima su prikazani dobijeni koeficijenti trenja, prelaza toplote i prelaza mase. Korišćenjem koncepta pseudofluida, pokazano je postojanje analogije prenosa količine kretanja, toplote i mase u transportnoj cevi za paralelni režim strujanja.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles
T1  - Analogija prenosa količine kretanja, toplote i mase pri vertikalnom hidrauličkom transportu inertnih čestica
EP  - 25
IS  - 1
SP  - 15
VL  - 68
DO  - 10.2298/HEMIND130207025J
ER  - 

@article{
author = "Jaćimovski, Darko and Garić-Grulović, Radmila and Grbavčić, Željko and Đuriš, Mihal and Bošković-Vragolović, Nevenka",
year = "2014",
abstract = "Wall-to-bed momentum, heat and mass transfer in the vertical liquid-solids flow, as well as in the single phase flow, were studied. The aim of this investigation was to establish the analogy among those phenomena. Also, effect of particle concentration on momentum, heat and mass transfer was studied. The experiments in hydraulic transport were performed in 25.4 mm I.D. cooper tube equipped with a steam jacket, using spherical glass particles of 1.94 mm in diameter and water as a transport fluid. The segment of the transport tube used for mass transfer measurements had internal coating made of benzoic acid. In the hydraulic transport two characteristic flow regimes were observed: turbulent and parallel particle flow regime. The transition between two characteristic regimes (Y* = 0), occurs at a critical voidage ε ≈ 0.85. The vertical two-phase flow was con­sidered as the pseudofluid, and modified mixture-wall friction coefficient (fw) and modified mixture Reynolds number (Rem) were introduced for system characterization. Experimental data show that the wall-to-bed momentum, heat and mass transfer coefficients, in vertical flow of pseudofluid, for the turbulent regime are significantly higher than in parallel regime. Wall-to-bed, mass and heat transfer coefficients in hydraulic transport of particles were much higher than in single-phase flow for lower Reynolds numbers (Re  lt  15000), while for high Reynolds numbers (Re  gt  15000), there was not significant difference. The experimental data for wall-to-bed momentum, heat and mass transfer in vertical flow of pseudofluid in parallel particle flow regime, verify analogy among these three phenomena., U ovom radu prikazani su rezultati eksperimentalnih ispitivanja prenosa količine kretanja, toplote i mase zid-fluid u vertikalnom hidrauličkom transportu inertnih čestica i pri strujanju fluida u cevi istog prečnika. Eksperimentalna ispitivanja vršena su istovremenim merenjem potrebnih parametara za definisanje navedenih prenosa. Cilj ovih ispitivanja bio je određivanje koeficijenata prenosa pri vertikalnom hidrauličkom transportu inertnih čestica i uspostavljanje analogije tri prenosa. Eksperimentalni sistem predstavljala je vertikalna transportna cev prečnika 25,4 mm snabdevena omotačem za zagrevanje parom, kao i segmentom transportne cevi prepariranim rastopom benzoeve kiseline. Kao fluid korišćena je voda, a vršen je transport staklenih sfernih čestica prečnika 1,94 mm. U rezultatima su prikazani dobijeni koeficijenti trenja, prelaza toplote i prelaza mase. Korišćenjem koncepta pseudofluida, pokazano je postojanje analogije prenosa količine kretanja, toplote i mase u transportnoj cevi za paralelni režim strujanja.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles, Analogija prenosa količine kretanja, toplote i mase pri vertikalnom hidrauličkom transportu inertnih čestica",
pages = "25-15",
number = "1",
volume = "68",
doi = "10.2298/HEMIND130207025J"
}

Jaćimovski, D., Garić-Grulović, R., Grbavčić, Ž., Đuriš, M.,& Bošković-Vragolović, N.. (2014). Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles. in Hemijska industrija
Association of Chemical Engineers of Serbia., 68(1), 15-25.
https://doi.org/10.2298/HEMIND130207025J

Jaćimovski D, Garić-Grulović R, Grbavčić Ž, Đuriš M, Bošković-Vragolović N. Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles. in Hemijska industrija. 2014;68(1):15-25.
doi:10.2298/HEMIND130207025J .

Jaćimovski, Darko, Garić-Grulović, Radmila, Grbavčić, Željko, Đuriš, Mihal, Bošković-Vragolović, Nevenka, "Momentum, heat, and mass transfer analogy for vertical hydraulic transport of inert particles" in Hemijska industrija, 68, no. 1 (2014):15-25,
https://doi.org/10.2298/HEMIND130207025J . .

TY  - JOUR
AU  - Duriš, Mihal
AU  - Garić-Grulović, Radmila
AU  - Arsenijević, Zorana
AU  - Jaćimovski, Darko
AU  - Grbavčić, Željko
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5728
AB  - Fluidization experiments were conducted on four fractions of filtration (quartz) sand using columns of 144 and 64mm i.d. The size distribution of the fractions obtained by sieving followed an approximately modified normal (Gaussian) particle size distribution with respect to the projected particle diameter, while the shape factor decreased linearly with increasing projected particle diameter. The expansion characteristics of the sand particles followed a Richardson-Zaki relationship. The intercept velocity, i.e., the extrapolated value of the fluid superficial velocity to ε=1 on the plot log (U) vs. log (ε), agreed quite well with the experimentally determined mean free settling velocity of the cloud of about 30 randomly selected particles. During fluidization, the beds were hydraulically separated into 10 sub-fractions, which are then analyzed. For the mixture dp=0.75-1.25mm during fluidization at an overall bed expansion of 35%, the bed partially segregated since, remarkably, the smallest particles were concentrated at the top, while the largest particles were concentrated in the bottom zone. In the remaining part of the bed (about 80% of total mass), the particles were well mixed. Similar experiments were performed with sand mixtures dp=1.60-2.00mm, dp=1.40-2.00mm and dp=1.166-2.00mm. By analyzing the particle size distribution at the bottom and at the top of the bed, it was concluded that the bed was well mixed if the sieving ratio of the largest to smallest sieve opening was less than about 1.5.
PB  - Elsevier
T2  - Powder Technology
T1  - Segregation in water fluidized beds of sand particles
EP  - 179
SP  - 173
VL  - 235
DO  - 10.1016/j.powtec.2012.10.004
ER  - 

@article{
author = "Duriš, Mihal and Garić-Grulović, Radmila and Arsenijević, Zorana and Jaćimovski, Darko and Grbavčić, Željko",
year = "2013",
abstract = "Fluidization experiments were conducted on four fractions of filtration (quartz) sand using columns of 144 and 64mm i.d. The size distribution of the fractions obtained by sieving followed an approximately modified normal (Gaussian) particle size distribution with respect to the projected particle diameter, while the shape factor decreased linearly with increasing projected particle diameter. The expansion characteristics of the sand particles followed a Richardson-Zaki relationship. The intercept velocity, i.e., the extrapolated value of the fluid superficial velocity to ε=1 on the plot log (U) vs. log (ε), agreed quite well with the experimentally determined mean free settling velocity of the cloud of about 30 randomly selected particles. During fluidization, the beds were hydraulically separated into 10 sub-fractions, which are then analyzed. For the mixture dp=0.75-1.25mm during fluidization at an overall bed expansion of 35%, the bed partially segregated since, remarkably, the smallest particles were concentrated at the top, while the largest particles were concentrated in the bottom zone. In the remaining part of the bed (about 80% of total mass), the particles were well mixed. Similar experiments were performed with sand mixtures dp=1.60-2.00mm, dp=1.40-2.00mm and dp=1.166-2.00mm. By analyzing the particle size distribution at the bottom and at the top of the bed, it was concluded that the bed was well mixed if the sieving ratio of the largest to smallest sieve opening was less than about 1.5.",
publisher = "Elsevier",
journal = "Powder Technology",
title = "Segregation in water fluidized beds of sand particles",
pages = "179-173",
volume = "235",
doi = "10.1016/j.powtec.2012.10.004"
}

Duriš, M., Garić-Grulović, R., Arsenijević, Z., Jaćimovski, D.,& Grbavčić, Ž.. (2013). Segregation in water fluidized beds of sand particles. in Powder Technology
Elsevier., 235, 173-179.
https://doi.org/10.1016/j.powtec.2012.10.004

Duriš M, Garić-Grulović R, Arsenijević Z, Jaćimovski D, Grbavčić Ž. Segregation in water fluidized beds of sand particles. in Powder Technology. 2013;235:173-179.
doi:10.1016/j.powtec.2012.10.004 .

Duriš, Mihal, Garić-Grulović, Radmila, Arsenijević, Zorana, Jaćimovski, Darko, Grbavčić, Željko, "Segregation in water fluidized beds of sand particles" in Powder Technology, 235 (2013):173-179,
https://doi.org/10.1016/j.powtec.2012.10.004 . .