Mixed convection flows of tangent hyperbolic fluid past an isothermal wedge with entropy : a mathematical study

Reddy, PR; Gaffar, SA; Khan, MH; Venkatadri, K; Beg, OA

Abstract

The non-linear, steady, mixed convective boundary layer flow and heat transfer of an incompressible tangent hyperbolic non-Newtonian fluid from an isothermal wedge in the presence of magnetic field is analyzed numerically using the Keller Box implicit finite difference technique. The entropy analysis due to MHD flow of tangent hyperbolic fluid past an isothermal wedge and viscous dissipation is also included. The numerical code is validated with previous Newtonian studies available in the literature. Graphical and tabulated results are analyzed to study the behavior of fluid velocity, temperature, concentration, shear stress, heat transfer rate, entropy generation number and Bejan number for various emerging thermo physical parameters, namely, Weissenberg number ( We), power Jaw index ( n), mixed convection parameter (,l), pressure gradient parameter ( m), Prandtl number (Pr), Biot number (y), Hartmann number (Ha ), Brinkmann number (Br),
Reynolds number (Re ) and temperature gradient ( lI). It is observed that velocity, entropy,
Bejan number and surface heat transfer rate are reduced with increasing Weissenberg number,
but temperature and local skin friction are increased. Increasing pressure gradient enhances
velocity, entropy, local skin friction and surface heat transfer rate but reduces temperature and
Bejan number. An increase in an isothermal power law index (n) is observed to increase velocity, Bejan
number and surface heat transfer rate but decreases temperature, entropy and local skin friction.
Increasing magnetic parameter (Ha) is found to decrease temperature, entropy, surface heat
transfer rate and local skin friction and increases velocity and Bejan number. The research is
applicable for coating materials in chemical engineering for instance, robust paints, production of
aerosol deposition and water soluble solution thermal treatment.

Citation

Reddy, P., Gaffar, S., Khan, M., Venkatadri, K., & Beg, O. (2021). Mixed convection flows of tangent hyperbolic fluid past an isothermal wedge with entropy : a mathematical study. Heat Transfer, 50(3), 2895-2928. https://doi.org/10.1002/htj.22011

• Journal Article Type: Article
• Acceptance Date: Nov 14, 2020
• Online Publication Date: Dec 9, 2020
• Publication Date: May 1, 2021
• Deposit Date: Nov 16, 2020
• Publicly Available Date: Dec 9, 2021
• Journal: Heat Transfer
• Print ISSN: 2688-4534
• Electronic ISSN: 2688-4542
• Publisher: Wiley
• Volume: 50
• Issue: 3
• Pages: 2895-2928
• DOI: https://doi.org/10.1002/htj.22011
• Publisher URL: https://doi.org/10.1002/htj.22011
• Related Public URLs: https://onlinelibrary.wiley.com/journal/26884542
• Additional Information: Access Information : This is the peer reviewed version of the following article: Ramesh Reddy, P, Abdul Gaffar, S, Khan, BMH, Venkatadri, K, Anwar Beg, O. Mixed convection flows of tangent hyperbolic fluid past an isothermal wedge with entropy: A mathematical study. Heat Transfer. 2021; 50: 2895– 2928., which has been published in final form at https://doi.org/10.1002/htj.22011. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.