抄録
A numerical analysis was performed on the flow and mass transfer of counter-current water and gas flows in a vertical parallel plate channel. In order to deal with the moving gas-liquid interface, boundary-fitted coordinates were employed both for water and gas phases. A sinusoidal disturbance was added to the initial smooth film. It was found that the smooth film is unstable resulting in a fully developed solitary-like large wave. A circulating flow exists in the large wave which enhances the mass transfer. The enhancement is more remarkable for the mass transfer in liquid with high Schmidt number. With the increase of the gas velocity the wave height increases, and the circulating flow in the wave becomes more complicated one due to the shear force by the gas flow.
