Effects of variable fluid properties on the thin film flow of Ostwald-de Waele fluid over a stretching surface

    Authors

    K. Vajravelu; K. V. Prasad;B. T. Raju

    Comments

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    Abbreviated Journal Title

    J. Hydrodyn.

    Keywords

    Thin film flow; variable fluid properties; viscous dissipation; finite; difference method; HEAT-TRANSFER; LIQUID-FILM; VISCOUS DISSIPATION; SHEET; Mechanics

    Abstract

    We investigate, in this paper, the effects of thermo-physical properties on the flow and heat transfer in a thin film of a power-law liquid over a horizontal stretching surface in the presence of a viscous dissipation. The fluid properties, namely the fluid viscosity and the fluid thermal conductivity, are assumed to vary with temperature. Using a similarity transformation, the governing partial differential equations with a time dependent boundary are converted into coupled non-linear Ordinary Differential Equations (ODEs) with variable coefficients. Numerical solutions of the coupled ODEs are obtained by a finite difference scheme known as the Keller-box method. Results for the velocity and temperature distributions are presented graphically for different values of the pertinent parameters. The effects of unsteady parameter on the skin friction, the wall temperature gradient and the film thickness are presented and analyzed for zero and non-zero values of the temperature-dependent thermo-physical properties. The results obtained reveal many interesting features that warrant further study on the non-Newtonian thin film fluid flow phenomena, especially the shear-thinning phenomena.

    Journal Title

    Journal of Hydrodynamics

    Volume

    25

    Issue/Number

    1

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    10

    Last Page

    19

    WOS Identifier

    WOS:000318027100002

    ISSN

    1001-6058

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