Unsteady free convective heat transfer in third-grade fluid flow from an isothermal vertical plate : a thermodynamic analysis

Hiremath, A, Reddy, GJ, Kumar, M and Beg, OA ORCID: https://orcid.org/0000-0001-5925-6711 2019, 'Unsteady free convective heat transfer in third-grade fluid flow from an isothermal vertical plate : a thermodynamic analysis' , International Journal of Modern Physics B, 33 (8) , p. 1950060.

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Abstract

The current study investigates theoretically and numerically the entropy generation in time-dependent free-convective third-grade viscoelastic fluid convection flow from a vertical plate. The non-dimensional conservation equations for mass, momentum, and energy are solved using a Crank-Nicolson finite difference method with suitable boundary conditions. Expressions for known values of flow-variables coefficients are also derived for the wall heat transfer and skin friction and numerically evaluated. The effect of Grashof number, Prandtl number, group parameter (product of dimensionless temperature difference and Brinkman number) and third-grade parameter on entropy heat generation is analyzed and shown graphically. Bejan line distributions are also presented for the influence of several control parameters. The computations reveal that with increasing third-grade parameter the entropy generation decreases and Bejan number increases. Also, the comparison graph shows that contour lines for third-grade fluid vary considerably from the Newtonian fluid. The study is relevant to non-Newtonian thermal materials processing systems.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: International Journal of Modern Physics B
Publisher: World Scientific
ISSN: 0217-9792
Related URLs:
Depositing User: OA Beg
Date Deposited: 07 Jan 2019 14:15
Last Modified: 25 Mar 2020 02:30
URI: http://usir.salford.ac.uk/id/eprint/49631

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