TY  - JOUR
AU  - Bošković, Stefan A.
AU  - Karač, Aleksandar
AU  - Vrhovac, Slobodan B.
AU  - Aleksandar, Belić
AU  - Bugarski, Branko
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6619
AB  - The electrohydrodynamics' (EHD) perfect dielectric model was added into computational fluid dynamics (CFD) software OpenFOAM® in order to improve its usability for the EHD field and specifically for the mentioned model. Based on the investigated literature, it can be said that this is the most complete implementation of the said model. Two sets of numerical simulations with two different fluids are presented and analyzed. One set is one-dimensional. The other set is with a drop of one fluid surrounded by other fluid. Oscillations can be observed with certain expressions or calculation strategies for the electrostrictive force, and used for disregarding them. Results that are closer to analytical predictions can be obtained by using appropriate expression for the dielectric force. The electrostrictive force was implemented not only for nonpolar, but also for polar fluids, and it is shown that it might significantly influence the drop deformation. Calculated and analytically predicted drop deformations were close or comparable even up to around 0.25, what is significantly higher and different from a previous study made by other authors. Different expressions for the electric permittivity and usage of limiters for volume fractions were investigated. Conclusions from this paper can be transferred to more complicated models.
PB  - University of East Sarajevo, Faculty of Technology Zvornik
T2  - Journal of Engineering & Processing Management
T1  - Implementation of the electrohydrodynamics' perfect dielectric model in OpenFOAM®
EP  - 75
IS  - 2
SP  - 66
VL  - 14
DO  - 10.7251/JEPM2202066B
ER  - 

@article{
author = "Bošković, Stefan A. and Karač, Aleksandar and Vrhovac, Slobodan B. and Aleksandar, Belić and Bugarski, Branko",
year = "2022",
abstract = "The electrohydrodynamics' (EHD) perfect dielectric model was added into computational fluid dynamics (CFD) software OpenFOAM® in order to improve its usability for the EHD field and specifically for the mentioned model. Based on the investigated literature, it can be said that this is the most complete implementation of the said model. Two sets of numerical simulations with two different fluids are presented and analyzed. One set is one-dimensional. The other set is with a drop of one fluid surrounded by other fluid. Oscillations can be observed with certain expressions or calculation strategies for the electrostrictive force, and used for disregarding them. Results that are closer to analytical predictions can be obtained by using appropriate expression for the dielectric force. The electrostrictive force was implemented not only for nonpolar, but also for polar fluids, and it is shown that it might significantly influence the drop deformation. Calculated and analytically predicted drop deformations were close or comparable even up to around 0.25, what is significantly higher and different from a previous study made by other authors. Different expressions for the electric permittivity and usage of limiters for volume fractions were investigated. Conclusions from this paper can be transferred to more complicated models.",
publisher = "University of East Sarajevo, Faculty of Technology Zvornik",
journal = "Journal of Engineering & Processing Management",
title = "Implementation of the electrohydrodynamics' perfect dielectric model in OpenFOAM®",
pages = "75-66",
number = "2",
volume = "14",
doi = "10.7251/JEPM2202066B"
}

Bošković, S. A., Karač, A., Vrhovac, S. B., Aleksandar, B.,& Bugarski, B.. (2022). Implementation of the electrohydrodynamics' perfect dielectric model in OpenFOAM®. in Journal of Engineering & Processing Management
University of East Sarajevo, Faculty of Technology Zvornik., 14(2), 66-75.
https://doi.org/10.7251/JEPM2202066B

Bošković SA, Karač A, Vrhovac SB, Aleksandar B, Bugarski B. Implementation of the electrohydrodynamics' perfect dielectric model in OpenFOAM®. in Journal of Engineering & Processing Management. 2022;14(2):66-75.
doi:10.7251/JEPM2202066B .

Bošković, Stefan A., Karač, Aleksandar, Vrhovac, Slobodan B., Aleksandar, Belić, Bugarski, Branko, "Implementation of the electrohydrodynamics' perfect dielectric model in OpenFOAM®" in Journal of Engineering & Processing Management, 14, no. 2 (2022):66-75,
https://doi.org/10.7251/JEPM2202066B . .

TY  - JOUR
AU  - Bošković, Stefan A.
AU  - Karač, Aleksandar
AU  - Vrhovac, Slobodan B.
AU  - Belić, Aleksandar
AU  - Bugarski, Branko
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5148
AB  - A perfect dielectric model was incorporated into the OpenFOAM® software and used for investigation and, possibly, improvements of electrohydrodynamic calculations. Two different sets of numerical simulations were analyzed, in which two different fluids were present. The first set was one-dimensional, while in the second, a drop of one fluid was surrounded by the other fluid. It is shown that oscillations and possibly artificial generation of a curl of the electric field strength can be observed at applying certain expressions or calculation strategies, which can be thus abandoned. Usage of dynamic meshes, at least those present in the used software, and of limiters for the gradient of the electric field strength can lead to large numerical errors. It is also shown that usage of certain cell face values could improve the results. An electric Courant number was derived by dimensional analysis, and it could be suggested for future calculations. Conclusions made in this paper are expected to be transferable to other more complicated models.
AB  - Model idealnog dielektrika je uključen u programski paket OpenFOAM® (OpenFOAM Foundation, UK) i korišćen za ispitivanje i moguće poboljšavanje elektrohidrodinamičkih proračuna. Analizirana su dva različita seta numeričkih simulacija, u kojima su bila modelovana dva različita fluida. Prvi set je bio jednodimenzionalan dok je u drugom setu kap jednog fluida bila okružena drugim fluidom. U radu je pokazano da se određeni izrazi ili strategije izračunavanja mogu odbaciti usled pojave oscilacija i mogućeg veštačkog stvaranja rotora jačine električnog polja. Korišćenje pokretnih mreža, barem onih prisutnih u programskom paketu OpenFOAM®, i limitera za gradijent jačine električnog polja mogu dovesti do velikih numeričkih grešaka. Takođe je pokazano da bi korišćenje određenih vrednosti sa površi ćelija moglo poboljšati rezultate. Izraz za električni Kuronov broj je izveden dimenzionom analizom i mogao bi se preporučiti za buduće proračune. Očekuje se da su zaključci iz ovog rada prenosivi na druge, komplikovanije modele.
PB  - Savez hemijskih inženjera Srbije
T2  - Hemijska industrija
T1  - Investigation of electrohydrodynamic calculations
T1  - Ispitivanje elektrohidrodinamičkih proračuna
EP  - 74
IS  - 2
SP  - 65
VL  - 76
DO  - 10.2298/HEMIND211110010B
ER  - 

@article{
author = "Bošković, Stefan A. and Karač, Aleksandar and Vrhovac, Slobodan B. and Belić, Aleksandar and Bugarski, Branko",
year = "2022",
abstract = "A perfect dielectric model was incorporated into the OpenFOAM® software and used for investigation and, possibly, improvements of electrohydrodynamic calculations. Two different sets of numerical simulations were analyzed, in which two different fluids were present. The first set was one-dimensional, while in the second, a drop of one fluid was surrounded by the other fluid. It is shown that oscillations and possibly artificial generation of a curl of the electric field strength can be observed at applying certain expressions or calculation strategies, which can be thus abandoned. Usage of dynamic meshes, at least those present in the used software, and of limiters for the gradient of the electric field strength can lead to large numerical errors. It is also shown that usage of certain cell face values could improve the results. An electric Courant number was derived by dimensional analysis, and it could be suggested for future calculations. Conclusions made in this paper are expected to be transferable to other more complicated models., Model idealnog dielektrika je uključen u programski paket OpenFOAM® (OpenFOAM Foundation, UK) i korišćen za ispitivanje i moguće poboljšavanje elektrohidrodinamičkih proračuna. Analizirana su dva različita seta numeričkih simulacija, u kojima su bila modelovana dva različita fluida. Prvi set je bio jednodimenzionalan dok je u drugom setu kap jednog fluida bila okružena drugim fluidom. U radu je pokazano da se određeni izrazi ili strategije izračunavanja mogu odbaciti usled pojave oscilacija i mogućeg veštačkog stvaranja rotora jačine električnog polja. Korišćenje pokretnih mreža, barem onih prisutnih u programskom paketu OpenFOAM®, i limitera za gradijent jačine električnog polja mogu dovesti do velikih numeričkih grešaka. Takođe je pokazano da bi korišćenje određenih vrednosti sa površi ćelija moglo poboljšati rezultate. Izraz za električni Kuronov broj je izveden dimenzionom analizom i mogao bi se preporučiti za buduće proračune. Očekuje se da su zaključci iz ovog rada prenosivi na druge, komplikovanije modele.",
publisher = "Savez hemijskih inženjera Srbije",
journal = "Hemijska industrija",
title = "Investigation of electrohydrodynamic calculations, Ispitivanje elektrohidrodinamičkih proračuna",
pages = "74-65",
number = "2",
volume = "76",
doi = "10.2298/HEMIND211110010B"
}

Bošković, S. A., Karač, A., Vrhovac, S. B., Belić, A.,& Bugarski, B.. (2022). Investigation of electrohydrodynamic calculations. in Hemijska industrija
Savez hemijskih inženjera Srbije., 76(2), 65-74.
https://doi.org/10.2298/HEMIND211110010B

Bošković SA, Karač A, Vrhovac SB, Belić A, Bugarski B. Investigation of electrohydrodynamic calculations. in Hemijska industrija. 2022;76(2):65-74.
doi:10.2298/HEMIND211110010B .

Bošković, Stefan A., Karač, Aleksandar, Vrhovac, Slobodan B., Belić, Aleksandar, Bugarski, Branko, "Investigation of electrohydrodynamic calculations" in Hemijska industrija, 76, no. 2 (2022):65-74,
https://doi.org/10.2298/HEMIND211110010B . .