Computational fluid dynamic- two fluid model study of gas-solid heat transfer in a riser with various inclination angles

被引：4
作者：
Azizi K. [1 ]
Keshavarz Moraveji M. [1 ]
机构：
[1] Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran
来源：
Keshavarz Moraveji, M. (Moraveji@aut.ac.ir) | 1600年 / Materials and Energy Research Center卷 / 30期
关键词：
Computational fluid dynamic simulation; Fluidized bed; Heat transfer; Inclination angle;
D O I：
10.5829/idosi.ije.2017.30.04a.02
中图分类号：
学科分类号：
摘要：
A two fluid model (TFM) was used to study gas-solid heat transfer in a riser with different inclination angles. A two dimensional pipe with 5.8 cm internal diameter and 5 meter length was chosen. Effect of bed angle and solid particles feed rate were studied on the heat transfer behavior of gas and solid particles. Obtained results from simulation are compared with the experimental data in the relevant literature. Heat transfer behavior of phases is different in an inclined pipe in comparison with vertical and horizontal pipes. It is found that higher air-solid Nusselt number, air temperature difference and particle temperature difference take place at the pipe with inclination angle equal to 45 degrees. Loading ratio enhancement increases gas temperature differences. At lower and higher loading ratio, particles temperature differences decreases and increases respectively with loading ratio enhancement. © 2017, Materials and Energy Research Center. All rights reserved.
引用
收藏
页码：464 / 472
页数：8
相关论文
共 22 条
  • [1] Hamzehei M., Rahimzadeh H., Ahmadi G., Computational and experimental study of heat transfer and hydrodynamics in a 2d gas- solid fluidized bed reactor, Industrial & Engineering Chemistry Research, 49, 11, pp. 5110-5121, (2010)
  • [2] Li J., Mason D., A computational investigation of transient heat transfer in pneumatic transport of granular particles, Powder Technology, 112, 3, pp. 273-282, (2000)
  • [3] Rajan K., Srivastava S., Pitchumani B., Mohanty B., Simulation of gas-solid heat transfer during pneumatic conveying: Use of multiple gas inlets along the duct, International Communications in Heat and Mass Transfer, 33, 10, pp. 1234-1242, (2006)
  • [4] Mansoori Z., Saffar-Avval M., Tabrizi H.B., Ahmadi G., Experimental study of turbulent gas-solid heat transfer at different particles temperature, Experimental Thermal and Fluid Science, 28, 6, pp. 655-665, (2004)
  • [5] Shi D., Nicolai R., Reh L., Wall-to-bed heat transfer in circulating fluidized beds, Chemical Engineering and Processing: Process Intensification, 37, 4, pp. 287-293, (1998)
  • [6] Rajan K., Dhasandhan K., Srivastava S., Pitchumani B., Studies on gas-solid heat transfer during pneumatic conveying, International Journal of Heat and Mass Transfer, 51, 11, pp. 2801-2813, (2008)
  • [7] Mellin P., Zhang Q., Kantarelis E., Yang W., An euler-euler approach to modeling biomass fast pyrolysis in fluidized-bed reactors-focusing on the gas phase, Applied Thermal Engineering, 58, 1, pp. 344-353, (2013)
  • [8] Jin G., Zhang M., Fang Z., Cui Z., Song C., Numerical study on spout elevation of a gas-particle spout fluidized bed in microwave-vacuum dryer, Journal of Food Engineering, 143, pp. 8-16, (2014)
  • [9] Azizi S., Mowla D., Cfd modeling of algae flash pyrolysis in the batch fluidized bed reactor including heat carrier particles, International Journal of Chemical Reactor Engineering, 14, 1, pp. 463-480, (2016)
  • [10] Azizi S., Taheri M., Mowla D., Numerical modeling of heat transfer for gas-solid flow in vertical pipes, Numerical Heat Transfer, Part A: Applications, 62, 8, pp. 659-677, (2012)
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