C-235 開水路流れの気液界面を通しての物質移動に及ぼす降雨の効果

概要

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The effects of rainfall on the mass transfer across the air-water interface were investigated through CO_2 absorption experiments in an open channel. The results show that the rainfall enhances the mass transfer across the air-water interface and the mass transfer coefficient is well correlated with the kinetic energy flux of rain drops. In addition, the promotion mechanism was investigated measuring instantaneous streamwise and vertical velocities in the water flow. It is found that the interface is intensively broken by the impacts of rain droplets and the mass transfer is promoted owing to the intense interface breaking. These results also suggest that the rainfall effects should be included in climate models for estimating the global heat and mass exchange rate between the atmosphere and ocean.
日本流体力学会の論文
2003-07-28