Modeling of molecular diffusion and thermal conduction with multi-particle interaction in compressible turbulence
作者： Y. Tai , T. Watanabe , K. Nagata
DOI: 10.1063/1.5018248
关键词:
摘要: A mixing volume model (MVM) originally proposed for molecular diffusion in incompressible flows is extended as a and thermal conduction compressible turbulence. The model, established implementation Lagrangian simulations, based on the interactions among spatially distributed notional particles within finite volume. MVM tested with direct numerical simulation of planar jets jet Mach number ranging from 0.6 to 2.6. well predicts wide range size particles. In transitional region jet, where scalar field exhibits sharp jump at edge shear layer, smaller required an accurate prediction mean effects diffusion. time scale defined diffusive length correlated passive temperature. Probability density functions are similar when larger than dissipative because small scales easily affected by different distributions intermittent small-scale structures between assumption equal useful modeling dissipation rate temperature fluctuations difficult.A cor...
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