Title

The effects of variable fluid properties and thermocapillarity on the flow of a thin film on an unsteady stretching sheet

Authors

Authors

B. S. Dandapat; B. Santra;K. Vajravelu

Comments

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Abbreviated Journal Title

Int. J. Heat Mass Transf.

Keywords

thin film; boundary layer; thermocapillarity; variable viscosity; variable thermal conductivity; POWER-LAW FLUID; HEAT-TRANSFER; LIQUID-FILM; SURFACE; DIFFUSION; Thermodynamics; Engineering, Mechanical; Mechanics

Abstract

The effects of variable viscosity, variable thermal conductivity and themocapillarity on the flow and heat transfer in a laminar liquid film on a horizontal stretching sheet is analyzed. Using a similarity transformation the governing time dependent boundary layer equations for momentum and thermal energy are reduced to a set of coupled ordinary differential equations. The resulting five-parameter problem is solved numerically for some representative value of the parameters. It is shown that the film thickness increases with the increase in viscosity of the fluid. In other words viscosity resists film thinning. Further it is shown that more heat flows out of the liquid through the stretching surface when conductivity increases with temperature than that for the case when conductivity decreases with temperature. (c) 2006 Elsevier Ltd. All rights reserved.

Journal Title

International Journal of Heat and Mass Transfer

Volume

50

Issue/Number

5-6

Publication Date

1-1-2007

Document Type

Article

Language

English

First Page

991

Last Page

996

WOS Identifier

WOS:000244575000020

ISSN

0017-9310

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