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Irreversibility analysis of unsteady couette flow with variable viscosity

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Abstract

This paper investigates numerically the inherent irreversibility in unsteady generalized Couette flow between two parallel plates with variable viscosity. The nonlinear governing equations are derived from the Navier-Stokes equations and solved numerically using a semi-discretization finite difference method together with the Runge-Kutta-Fehlberg integration scheme. The profiles of velocity and the temperature obtained are used to compute the entropy generation number, Bejan number, skin friction and Nusselt number. The effects of embedded parameters on entire flow structure are presented graphically and discussed quantitatively.

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Authors and Affiliations

  1. Department of Mathematics and Statistics, Namibia University of Science and Technology, Windhoek, Namibia

    A. S. Eegunjobi

  2. Faculty of Military Science, Stellenbosch University, Stellenbosch, South Africa

    O. D. Makinde & M. S. Tshehla

  3. Faculty of Engineering Built Environment and Information Technology, Nelson Mandela Metropolitan University, Port Elizabeth, South Africa

    O. D. Makinde & O. Franks

Authors
  1. A. S. Eegunjobi
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  2. O. D. Makinde
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  3. M. S. Tshehla
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  4. O. Franks
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Corresponding author

Correspondence to A. S. Eegunjobi.

Additional information

Biography: EEGUNJOBI A. S. (1980-), Male, Ph. D., Lecturer

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Eegunjobi, A.S., Makinde, O.D., Tshehla, M.S. et al. Irreversibility analysis of unsteady couette flow with variable viscosity. J Hydrodyn 27, 304–310 (2015). https://doi.org/10.1016/S1001-6058(15)60485-1

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  • DOI: https://doi.org/10.1016/S1001-6058(15)60485-1

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