気液界面を通しての物質移動に及ぼす降雨の影響(流体工学,流体機械)

概要

論文の詳細を見る
The effects of rainfall on both mass transfer across the air-water interface and turbulence structure in the interfacial region were investigated through laboratory experiments in a turbulent open-channel flow. The CO_2 absorption rate by rain droplets impinging on the free surface and turbulence quantities were measured. The results show that the rainfall enhances the turbulent mixing near the free surface on the liquid side and the CO_2 transfer across the air-water interface. The mass transfer coefficient on the liquid side is well correlated by the mean kinetic energy of rain droplets impinging on the unit area of the air-water interface, KEF, and it is proportional to the square root of KEF. The maximum value of the mass transfer coefficient obtained in this study corresponds to that obtained in wind-driven turbulence with wind speed 15m/s. This suggests that it is of great importance to consider the effects of rainfall on the CO_2 exchange rate in a general circulation model for estimating the global warming.
社団法人日本機械学会の論文
2005-12-25