The effect of variable viscosity on the flow and heat transfer of a viscous Ag-water and Cu-water nanofluids

    Authors

    K. Vajravelu; K. V. Prasad;C. O. Ng

    Comments

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    Abbreviated Journal Title

    J. Hydrodyn.

    Keywords

    nanofluid particles; variable viscosity; boundary layers; viscous; dissipation; Keller-box method; TRANSFER ENHANCEMENT; NATURAL-CONVECTION; THERMAL-CONDUCTIVITY; NUMERICAL-SIMULATION; STRETCHING SHEET; SURFACE; COAGULATION; ENCLOSURE; Mechanics

    Abstract

    A numerical study is carried out to study the effects of the temperature dependent viscosity on the flow and heat transfer of a nanofluid over a flat surface in the presence of viscous dissipation. The governing nonlinear partial differential equations are transformed into nonlinear ordinary differential equations, and are solved numerically by the Keller-box method. The numerical results indicate that the effect of nanoparticle volume fraction is to increase the heat transfer and hence enhance the thermal boundary layer thickness. This is true even in the presence of variable viscosity and the viscous dissipation. Furthermore, the results obtained for heat transfer characteristics with nanoparticles reveal many interesting behaviors that warrant further study on the effects of the "nano-solid-particles".

    Journal Title

    Journal of Hydrodynamics

    Volume

    25

    Issue/Number

    1

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    1

    Last Page

    9

    WOS Identifier

    WOS:000318027100001

    ISSN

    1001-6058

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