風波気液界面近傍の乱流とスカラ輸送の直接数値シミュレーション(対流・拡散・渦・波動 界面現象(1),一般講演)

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  • Direct numerical simulation of turbulence and scalar transfer in a wind-driven air-water two-phase flow

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Three-dimensional direct numerical simulation (DNS) is applied to a wind-driven air-water two-phase flow, and the turbulence structure in boundary layers on both gas and liquid sides and the scalar transfer mechanism across the air-water interface are investigated. In order to capture the moving air-water interface, an Arbitrary Lagrangian Eulerian formulation (ALE) method is employed. The results show that the scalar transfer across the wind-driven air-water interface is mainly controlled by the streamwise vortices related to bursting motions on the liquid side.

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