Direct numerical simulation of gas-liquid mass transfer around a spherical contaminated bubble in the stagnant-cap regime

Kalyani Kentheswaran,Nicolas Dietrich,Sébastien Tanguy,Benjamin Lalanne

International Journal of Heat and Mass Transfer（2022）

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摘要

•Hydrodynamics of a rising bubble with Marangoni stress is solved with mass transfer.•The maximal tangential velocity is modelled as a function of the stagnant-cap angle.•Transfer rate is higher at the front but lower than for a clean bubble in this area.•A scaling law for the Sherwood number is proposed using global and local parameters.

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关键词

Mass transfer,Direct numerical simulation,Rising bubbles,Surfactants,Stagnant-cap regime

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