A NUMERICAL STUDY OF INTERFACIAL TRANSPORT TO A GAS-SHEARED WAVY LIQUID

Interfacial transport of a passive scalar from a gas to a thin liquid film is considered. The base flow in the liquid is laminar, with linea r velocity profile produced by gas shear. The velocity disturbances im posed by waves are simulated by an inviscid, constant-vorticity model. Numerically computed roil waves are shown to enhance interfacial tran sport by modifying the convection pattern below the crest and by induc ing a mixing effect on the substrate. It is argued that the entire wav e spectrum is active in this enhancement of interfacial transport. (C) 1998 Elsevier Science Ltd. All rights reserved.