Title

An Analytical Study of Simultaneous Heat and Binary Mass Transfer with Thermodynamic Coupling in Laminar Boundary-layer Flows

Date of Award

1967

Degree Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Biomedical and Chemical Engineering

Advisor(s)

William N. Gill

Keywords

chemical engineering, heat transfer, transport equations, thermodynamic coupling

Subject Categories

Chemical Engineering

Abstract

Reduction of heat transfer from hot fluid layers to solid surfaces has become a very important and challenging problem. Thermally resistant materials for turbine blades, exhaust nozzles, combustion chamber walls, high-speed aircraft, re-entry vehicles, etc. may be developed only within certain limits; beyond these a means must be found for maintaining tolerable surface temperatures by reducing heat transfer. Most of the methods proposed for this purpose involve the transfer of mass from or through the solid surface, or mass transfer from a liquid film covering the solid surface. A considerable body of literature treating the problem of simultaneous heat and mass transfer has arisen, and what is felt to be a representative selection of papers is reported throughout this study. To date interest has centered primarily upon single component boundary layers. However, it is likely that the mass transfer systems mentioned above will be multicomponent in nature. As a result there remains a number of effects to be discussed in detail, among these being property variation with concentration, thermodynamic coupling, and the effect of body forces acting on non-uniform density distributions caused by both temperature and concentration fields. The present study was initiated to investigate these effects for a number of binary gaseous systems, with air being the ambient gas in each case.

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