Thermophoresis in natural convection with variable properties

Citation
S. Jayaraj et al., Thermophoresis in natural convection with variable properties, HEAT MASS T, 34(6), 1999, pp. 469-475
Citations number
19
Categorie Soggetti
Mechanical Engineering
Journal title
HEAT AND MASS TRANSFER
ISSN journal
09477411 → ACNP
Volume
34
Issue
6
Year of publication
1999
Pages
469 - 475
Database
ISI
SICI code
0947-7411(199904)34:6<469:TINCWV>2.0.ZU;2-I
Abstract
The present paper deals with thermophoresis in Pr natural convection with v ariable properties for a laminar flow over a cold vertical flat plate. Vari ation of properties like density, viscosity and thermal conductivity with t emperature is included in the formulation of the problem. Selection of comp onents for the property ratio is made by fitting the property values betwee n the desired temperature limits. For a selected fluid, Prandtl number vari ation with temperature is neglected and the Prandtl number corresponding to film temperature is used for the analysis. Solution is carried out by fini te difference method. Variation of wall concentration and wall flux along t he length of plate is studied. The effect of thermophoretic coefficient on wall concentration is also studied. Results are presented in the form of gr aphs. The result is compared with similarity solution by Runge-Kutta method and found to be accurate up to second decimal place.