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

    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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