关键词: 流固两相流, 离散相模型, 随机轨道模型, 稀疏离散相, 两相耦合

Abstract: The dilute particle of fluid-solid two phase flow widely exists in practical application of chemical engineering, storage and transportation, separation etc. The description of the complex turbulent motion is one of the research hotspot and difficulty of two phase flow. The growing process of the dilute discrete phase model was reviewed in this paper, which from the theoretical basis, the modeling process, the numerical simulation method and the application of several aspects of the discrete phase model, the discrete phase model, the stochastic trajectory model, the improved stochastic trajectory model has carried on the detailed elaboration. The interaction coupling relationship between discrete and fluid phase was theoretically analyzed, and the corresponding model was evaluated. Then, the paper pointed out that the present problems and the future development direction of the discrete phase orbit model. This paper puts forward an advanced stochastic trajectory model which based on random Fourier series describing the discrete phase resultant force to describe the motion law of discrete phase to deal with fluid phase fluctuation velocity randomly in the future, so as to better describe the motion law of discrete phase, at the same time considering of the coupling two phase, to establish full coupling vibration dynamic model of two phase flow, and describe the movement characteristics of discrete phase of fluid-solid in the two phase flow comprehensively andsystematically, providing theoretical basis for the in-depth development of the dilute discrete model in fluid-solid two phase flow.

Key words: fluid-solid two phase flow, discrete phase model, stochastic trajectory model, sparse discrete phase, two phase coupling