固定波状気液界面を通してのスカラ輸送機構(流体工学,流体機械)

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タイトル別名
  • Scalar Transfer Across a Non-Mobile Wavy Gas-Liquid Interface(Fluids Engineering)
  • 固定波状気液界面を通してのスカラ輸送機構
  • コテイ ハジョウキエキ カイメン オ トオシテ ノ スカラ ユソウ キコウ

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Three-dimensional direct numerical simulation (DNS) is applied to a gas-liquid two-phase flow with a non-mobile wavy gas-liquid interface, and the turbulence structure in boundary layers on both gas and liquid sides and the scalar transfer mechanism across the gas-liquid interface are investigated. The results show that the scalar transfer across the non-mobile wavy gas-liquid interface is mainly controlled by the longitudinal vortices related to bursting motions on the liquid side, whose mechanism is similar to those across the flat and realistic wind-driven gas-liquid interfaces. However, since the scalar transfer is strongly affected by the fixed interface configuration, the low-scalar-flux streaks observed in the cases of the flat and realistic wind-driven gas-liquid interfaces do not clearly appear. This means that in order to precisely predict the scalar transfer rate across the realistic wind-driven gas-liquid interface, the non-mobile wavy gas-liquid interface is not suitable to be employed.

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