Investigation of a Laminar Two-Component Boundary Layer Along an Evaporation Liquid Film by Means of a Finite Difference Method

摘要

A flat liquid film of constant thickness, at rest, unilaterally wetting a plate is described as it evaporates into a stream of hot air. The two component boundary layer flow which is generated by this system as well as the coupled mass and heat transfer at the liquid film surface is calculated by means of an implicit finite difference method of Hermitian type, taking into account temperature and concentration dependent properties. The solutions of the coupled partial differential equations for mass, momentum, and energy are compared with other investigations with respect to accuracy, required iterations and grid points. The results underline the precision and the reliability of the numerical method used.