Numerical simulation of heat transfer in gas-particle two-phase flow with smoothed discrete particle hydrodynamics

被引:6
作者
Chen Fu-Zhen [1 ]
Qiang Hong-Fu [1 ]
Gao Wei-Ran [1 ]
机构
[1] Second Artillery Engn Univ, Fac 601, Xian 710025, Peoples R China
基金
中国国家自然科学基金;
关键词
smoothed discrete particle hydrodynamics; gas-particle two-phase flow; heat transfer; evaporation; GRANULAR-FLOW; WALL;
D O I
10.7498/aps.63.230206
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Heat transfer between particles and that between gas phase and particle phase in gas-particle two-phase flow cannot be ignored. Smoothed discrete particle hydrodynamics, as a new method for solving the gas-particle two-phase flow, has been used in simulating the aerolian sand transport successfully. Based on the smoothed discrete particle hydrodynamics method, a heat conduction model is presented in this paper and is used to simulate the heat transfer processes and the particle evaporation in gas-particle two-phase flow. Firstly, the equations to be solved are presented in which the energy equations are introduced for each phase and the second derivative item in conduction is treated by combining a standard smoothed particle hydrodynamics first derivative with a finite difference approximation of a first derivative. The heat conduction between particle and gas is computed from temperature difference and heat transfer coefficient. The disc-type particle cluster problem and bubble fluidized bed are simulated and the results are in close agreement with the two fluid model simulation results. The vaporization law for discrete phase droplet is used to deal with the particle evaporation and then a jet evaporation is simulated. Numerical results all show a good agreement with the discrete particle model results. It is indicated that the new method is of good accuracy and practical applicability.
引用
收藏
页数:17
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