Simultaneous heat and mass transfer in film absorption under laminar flow

Abstract This paper describes a theoretical analysis of the combined heat and mass transfer process taking place in the absorption of a gas or vapor into a laminar liquid film. The energy and diffusion equations are solved simultaneously to give the temperature and concentration variations at the liquid-gas interface and at the wall. Two cases of interest are considered: a constant temperature and an adiabatic wall. The Nusselt and Sherwood numbers are found to depend on the Peclet and Lewis numbers as well as on the equilibrium characteristics of the working materials.