鉛直チャネル内固気二相乱流のLES : 粒子分布と乱れの空間構造

概要

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Large eddy simulations (LES) of gas-solid turbulent channel flow were performed with considering inter-particle collision in order to study the preferential concentration observed in previous experiments. Trajectories of individual particles were pursued with the Lagrangian method and inter-particle collision was dealt with the deterministic method. Spatial structure of particle distribution was observed by visualizing the calculated flow field. Futhermore, the effects of Stokes number and inter-particle collision on the structure of particle distribution were discussed. It is found that particles of large Stokes number disperse nearly uniformly and particles of small Stokes number tend to form preferential concentration. Structure and scale of particel clouds calculated with the effect of inter-particle collision were in good agreement with previous experimental observations.
1999-06-25