Effect of Empirical Coefficients on Simulation in Two-Scale Second-Order Moment Particle-Phase Turbulence Model

HU Chun-bo; ZENG Zhuo-xiong

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Article Navigation > Applied Mathematics and Mechanics > 2006 > 27(11): 1305-1311

HU Chun-bo, ZENG Zhuo-xiong. Effect of Empirical Coefficients on Simulation in Two-Scale Second-Order Moment Particle-Phase Turbulence Model[J]. Applied Mathematics and Mechanics, 2006, 27(11): 1305-1311.

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Effect of Empirical Coefficients on Simulation in Two-Scale Second-Order Moment Particle-Phase Turbulence Model

HU Chun-bo¹,
ZENG Zhuo-xiong²

College of Astronautics, Northwestern Polytechnical University, Xi'an 710072, P. R. China;

Received Date: 2005-05-27
Rev Recd Date: 2006-08-07
Publish Date: 2006-11-15

Abstract

Abstract

A two-scale second-order moment two-phase turbulence model accounting for inter-particle collision was developed,based on the concept of particle large-scale fluctuation due to turbulence and particle small-scale fluctuation due to collision.The proposed model was used to simulate gas-particle downer reactor flows.The simulation results of particle volume fraction and mean velocity are in agreement with the experimental results.The sensitivity of the model prediction to variations in the values for the model constants is investigated,overall,the predictions do not reveal a large sensitivity to the values constants in the downer reactor,but a relatively great change of the constants has important effect on the prediction.
- two-phase flow,
- second-order moment model,
- two-scale fluctuation,
- empirical coefficient

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References(7)

References

[1]	Hanjalic K, Launder B E, Schiestel R.Multiple-time-scale concepts in turbulent transport modeling[A].In:Bradbur L S,Ed.Turbulent Shear Flows 2[C].New York:Springer-Verlag,1980,36—49.
[2]	Kim S W, Chen C P. A multiple-time-scale turbulence model based on variable partitioning of the time turbulent kinetic energy spectrum[J].Numerical Heat Transfer, Part B,1989,16(2):193—211.
[3]	蔡树棠，刘宇陆. 湍流理论[M].上海:上海交通大学出版社，1993.
[4]	Yamamoto M. Investigation of multiple-time-scale Reynolds stress model in homogeneous anisotropic turbulence[J].Internat J Heat and Fluid Flow,1995,16(5):417—428. doi: 10.1016/0142-727X(95)00045-R
[5]	周力行.多相湍流反应流体力学[M].北京:国防工业出版社，2002.
[6]	Yu Y,Zhou L X. A second-order moment two-phase turbulence model for dense gas-particle flows[A].In:Matsumoto Y,Hishida K,Eds.Proc 5th Inter Conf on Multiphase Flow[C/CD]. ICMF'04,Tokyo:Tnstitute of Technology,2004,161.
[7]	Wang Y, Bai D R, Jin Y. Hydrodynamics of cocurrent downflow circulating fluidized bed(CDCFB)[J].Powder Technology,1992,70(3):271—275. doi: 10.1016/0032-5910(92)80062-2