Entropy Generation in Third-Grade Non-Newtonian Fluid Flow and Heat Transport Through Porous Medium in a Horizontal Channel under Heat Generation

Authors

  • Amala Olkha Department of Mathematics, University of Rajasthan, Jaipur 302004, India
  • Mukesh Kumar Department of Mathematics, University of Rajasthan, Jaipur 302004, India
  • Rahul Choudhary Department of Mathematics, University of Rajasthan, Jaipur 302004, India

DOI:

https://doi.org/10.48048/tis.2024.6966

Keywords:

Non-Newtonian Fluid, Porous medium, Velocity Slip, Temperature Slip, Entropy production, Bejan number, Homotopy analysis method

Abstract

In this study, entropy production in flow along with heat transport of non-Newtonian fluid via porous medium, is analyzed. For fluid flow via porous medium, a modified Darcy resistance term, is taken in the momentum equation for third-grade fluid. Temperature-dependent viscosity is considered using Vogel’s model viscosity. Using adequate transformations, the momentum and heat transport equation are reduced to non-dimensional form and solved analytically invoking homotopy analysis method on MATHEMATICA software. Effects of parameters arising in the study are depicted by graphs on velocity distribution, temperature distribution, and entropy production with Bejan number and discussed. For validity of current findings, the values of velocity and temperature are computed for particular values of the parameters and equated with previously published results, excellent agreement achieved. Furthermore, skin-friction coefficient and Nusselt number values are expressed in tabular form for various values of relevant parameters and discussed. It is noticed that slip parameters $\left( \gamma \right)$ and $\left( \beta \right)$ reduce the entropy generation number $\left( NS \right)$. Also noticed that skin friction coefficient upsurges with rising velocity slip parameter $\left( \gamma \right)$ value while, effect of temperature slip parameter $\left( \beta \right)$ is observed to lessen Nusselt number in the absolute sense.

HIGHLIGHTS

  • Entropy production in third grade non-Newtonian fluid flow and heat transfer in a channel via porous medium is investigated in the presence of a heat source. Slip boundary conditions are applied.
  • The resulting governing equations are solved analytically using the homotopy analysis method (HAM).
  • Maximum entropy production observed near the lower wall of channel and Bejan number attains maximum value in middle of the channel.

GRAPHICAL ABSTRACT

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Published

2024-10-01