Flow Characteristics and Mass Transfer Formed Through a Perforated and a Wire Mesh

Abstract

The characteristics of liquid flow and mass transfer in a region close to a gas-liquid interface in a radial flow formed through a perforated plate and a wire mesh were experimentally investigated. Visualization of the flow between the wire mesh and the gas-liquid interface showed that eddies always existed near the gas-liquid interface. The radial distribution of the timemean velocity and the fluctuation velocity near gas-liquid interface showed that those were larger at the periphery than at the center. The mass transfer coefficient increased with increasing the mean time and fluctuation velocities. The mass transfer mechanism was considered using the maximum eddy length scale estimated using the normalized energy spectrum function. Consequently, the liquid-phase mass-transfer coefficient was proportional to the square root of the surface renewal rate using the maximum eddy length scale and consistent with that of the surface renewal model.