Hydrodynamic stability of liquid films adjacent to incompressible gas streams including effects of interface mass transfer
Abstract
A theoretical study of linear stability of a gas/liquid interface with and without evaporation at the interface is presented. The zero mass transfer problem is solved for linear mean velocity profiles in both gas and liquid. The mass transfer problem is solved for small rates of evaporation, which allows the reduction of exponential mean profiles to linear profiles. The analysis considers instabilities in both gas and liquid motions and thus departs from the customary assumption of gas motion over a rigid wavy wall. The system of governing equations yields an eigenvalue problem upon employing the methods of stability theory. The results show that neglecting instabilities in the gas motion would predict a stable interface at moderate values of wave numbers when it is actually unstable. Mass transfer investigations are restricted to the modified KelvinHelmholtz mode and computations indicate that interface evaporation has a destabilizing effect at moderate wave numbers.
 Publication:

Ph.D. Thesis
 Pub Date:
 1976
 Bibcode:
 1976PhDT........24J
 Keywords:

 Flow Stability;
 LiquidVapor Interfaces;
 Mass Transfer;
 Evaporation;
 Interface Stability;
 Fluid Mechanics and Heat Transfer