Second-order moment modeling of dispersed two-phase turbulence-Part 2-USM-Θ two-phase turbulence model and USM-SGS two-phase stress model  

作　　者：ZHOU LiXing 

机构地区：[1]Department of Engineering Mechanies, Tsinghua University, Beijing 100084, China (email: [e-mail])

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第7期1296-1303,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key Project of Fundamental Research of China (Grant No. G1999-0222-07-08);the Projects of the National Natural Science Foundation of China (Grant Nos. 50736006 and 50606026);the Foundation of the State Key Laboratory of Engines, Tianjin University (Grant No. K-2010-07)

摘　　要：Dense gas-particle flows are frequently encountered in fluidized beds,riser and downer reactors,pneumatic transport and the near-wall zone of dilute gas-particle flows.Particle-particle collision plays an important role in the behavior of two-phase flows.In this paper a USM-Q two-phase turbulence model for dense gas-particle flows is proposed to account for both two-phase turbulence and inter-particle collision.For two-fluid large-eddy simulation of gas-particle flows,the author proposed a unified second-order moment(USM) two-phase SGS stress model and a two-phase k-kp SGS energy-equation stress model.The proposed models can fully account for the interaction between the gas and particle SGS stresses.Dense gas-particle flows are frequently encountered in fluidized beds, riser and downer reactors, pneumatic transport and the near-wall zone of dilute gas-particle flows. Particle-particle collision plays an important role in the behavior of two-phase flows. In this paper a USM-Q two-phase turbulence model for dense gas-particle flows is proposed to account for both two- phase turbulence and inter-particle collision. For two-fluid large-eddy simulation of gas-particle flows, the author proposed a unified second-order moment （USM） two-phase SGS stress model and a two-phase k-kp SGS energy-equation stress model. The proposed models can fully account for the interaction between the gas and particle SGS stresses.

关 键 词：densed gas-particle flows second-order moment model two-phase turbulence large-eddy simulation 

分 类 号：O357.5[理学—流体力学] TK16[理学—力学]