Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime
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2022
Authors
Brzić, Danica
Pešić, Radojica

Arsenijević, Zorana

Đuriš, Mihal

Bošković-Vragolović, Nevenka

Kaluđerović-Radoičić, Tatjana

Article (Published version)

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The present work concerns an experimental study on heat transfer in gas-solid fluidized bed of coarse (Geldart D) particles to a larger immersed sphere at high superficial velocities from 2 to 5.5 Umf. The heat transfer coefficient was determined by measuring the temperature of the test sphere during its heating in a fluidized bed in the temperature range of 65–175 °C. The test spheres of different sizes and different materials were utilized. For the given gas-particles system the flow regime changes from rapidly growing bubbles to turbulent fluidization at superficial velocity Uc ≈ 3Umf. It has been found that in rapidly growing bubbles regime, the heat transfer coefficient is higher for smaller test spheres while it is almost independent of the superficial gas velocity. In turbulent regime, the heat transfer coefficient increases with increase of gas velocity while the size of the test sphere exhibits less influence. In the rapidly growing bubbles regime, experimental data for heat t...ransfer coefficient can be predicted adequately with correlation of Scott et al.. For the turbulent flow regime a new correlation for prediction of the heat transfer coefficient has been proposed.
Keywords:
heat transfer / turbulent flow regime / Geldart D particlesSource:
Particulate Science and Technology, 2022, 41, 1, 75-83Publisher:
- Taylor & Francis Online
Funding / projects:
- The development of efficient chemical-engineering processes based on the transport phenomena research and process intensification principles (RS-172022)
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM) (RS-200026)
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Brzić, Danica AU - Pešić, Radojica AU - Arsenijević, Zorana AU - Đuriš, Mihal AU - Bošković-Vragolović, Nevenka AU - Kaluđerović-Radoičić, Tatjana PY - 2022 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5052 AB - The present work concerns an experimental study on heat transfer in gas-solid fluidized bed of coarse (Geldart D) particles to a larger immersed sphere at high superficial velocities from 2 to 5.5 Umf. The heat transfer coefficient was determined by measuring the temperature of the test sphere during its heating in a fluidized bed in the temperature range of 65–175 °C. The test spheres of different sizes and different materials were utilized. For the given gas-particles system the flow regime changes from rapidly growing bubbles to turbulent fluidization at superficial velocity Uc ≈ 3Umf. It has been found that in rapidly growing bubbles regime, the heat transfer coefficient is higher for smaller test spheres while it is almost independent of the superficial gas velocity. In turbulent regime, the heat transfer coefficient increases with increase of gas velocity while the size of the test sphere exhibits less influence. In the rapidly growing bubbles regime, experimental data for heat transfer coefficient can be predicted adequately with correlation of Scott et al.. For the turbulent flow regime a new correlation for prediction of the heat transfer coefficient has been proposed. PB - Taylor & Francis Online T2 - Particulate Science and Technology T1 - Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime EP - 83 IS - 1 SP - 75 VL - 41 DO - https://doi.org/10.1080/02726351.2022.2053015 ER -
@article{ author = "Brzić, Danica and Pešić, Radojica and Arsenijević, Zorana and Đuriš, Mihal and Bošković-Vragolović, Nevenka and Kaluđerović-Radoičić, Tatjana", year = "2022", abstract = "The present work concerns an experimental study on heat transfer in gas-solid fluidized bed of coarse (Geldart D) particles to a larger immersed sphere at high superficial velocities from 2 to 5.5 Umf. The heat transfer coefficient was determined by measuring the temperature of the test sphere during its heating in a fluidized bed in the temperature range of 65–175 °C. The test spheres of different sizes and different materials were utilized. For the given gas-particles system the flow regime changes from rapidly growing bubbles to turbulent fluidization at superficial velocity Uc ≈ 3Umf. It has been found that in rapidly growing bubbles regime, the heat transfer coefficient is higher for smaller test spheres while it is almost independent of the superficial gas velocity. In turbulent regime, the heat transfer coefficient increases with increase of gas velocity while the size of the test sphere exhibits less influence. In the rapidly growing bubbles regime, experimental data for heat transfer coefficient can be predicted adequately with correlation of Scott et al.. For the turbulent flow regime a new correlation for prediction of the heat transfer coefficient has been proposed.", publisher = "Taylor & Francis Online", journal = "Particulate Science and Technology", title = "Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime", pages = "83-75", number = "1", volume = "41", doi = "https://doi.org/10.1080/02726351.2022.2053015" }
Brzić, D., Pešić, R., Arsenijević, Z., Đuriš, M., Bošković-Vragolović, N.,& Kaluđerović-Radoičić, T.. (2022). Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime. in Particulate Science and Technology Taylor & Francis Online., 41(1), 75-83. https://doi.org/https://doi.org/10.1080/02726351.2022.2053015
Brzić D, Pešić R, Arsenijević Z, Đuriš M, Bošković-Vragolović N, Kaluđerović-Radoičić T. Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime. in Particulate Science and Technology. 2022;41(1):75-83. doi:https://doi.org/10.1080/02726351.2022.2053015 .
Brzić, Danica, Pešić, Radojica, Arsenijević, Zorana, Đuriš, Mihal, Bošković-Vragolović, Nevenka, Kaluđerović-Radoičić, Tatjana, "Heat transfer to a sphere immersed in a fluidized bed of coarse particles with transition from bubbling to turbulent flow regime" in Particulate Science and Technology, 41, no. 1 (2022):75-83, https://doi.org/https://doi.org/10.1080/02726351.2022.2053015 . .