風波乱流場の直接数値シミュレーション : 格子・計算領域依存性評価による計算精度の検討(熱工学,内燃機関,動力など)

概要

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In this study, investigation of the effects of grid resolution and computational domain dependency on the DNS results of the wind-driven turbulent flow by means of direct numerical solution procedure for a coupled gas-liquid flow, i. e., MARS (Multi-Interfaces Advection and Reconstruction Solver) method, was conducted. Growing wind-driven surfaces, large computational domain size for the streamwise direction was demanded. On the other hand, the requirement computational domain size for the spanwise direction was closely linked with the typical wall turbulent structures consisted of the high and low speed streaks on the gas layer. The spectra of grown wind-driven surfaces follow the-4 power law. And the validities of the present DNS results, CASE 1 and 2 as the fully-developed wind-driven turbulent flows are revealed.
一般社団法人日本機械学会の論文
2003-11-25