HEAT AND MASS TRANSFER FLOW THROUGH POROUS MEDIUM WITH VARIABLE THERMAL CONDUCTIVITY AND SUCTION EFFECTS

Authors

  • Abubakar Sadiq Uba
    Nigerian Defence Academy, Kaduna
  • Emem Ayankop Andi
    Nigerian Defence Academy, Kaduna
  • Abubakar Abdullahi Wachin
    AFIT, Kaduna
  • Joseph Kpop Moses
    Kaduna State University image/svg+xml

Keywords:

Heat and Mass Transfer, Porous Medium, Variable thermal conductivity, Suction

Abstract

This study investigates heat and mass transfer flow through a porous medium with variable thermal conductivity and suction effects. Unsteady natural convection with magnetic field, radiation and pressure gradient were considered. Perturbation method was employed to derive analytical expressions for the dimensionless velocity, temperature, and concentration profiles. The influence of key dimensionless parameters—including variable thermal conductivity, temperature and mass buoyancy parameters (), magnetic field strength, suction parameter, Darcy number (), mass Grashof numbers (), radiation parameter (), Prandtl number (), chemical reaction rate (), Schmidt number (), and pressure gradient —were analyzed in detail. Results showed: increased in , (), (), (), and () enhanced velocity while ,  () and suppressed it. Temperature rises with increased , () and () but decreased with  and (). Species concentration decreased with stronger (), () and (). Additionally, Skin friction (), Nusselt number () and Sherwood number () exhibited significant sensitivity to variations in the governing parameters. The findings provided valuable insight into flow behavior in porous media with applications in geophysics, chemical engineering, and energy systems.

Dimensions

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Published

17-08-2025

How to Cite

HEAT AND MASS TRANSFER FLOW THROUGH POROUS MEDIUM WITH VARIABLE THERMAL CONDUCTIVITY AND SUCTION EFFECTS. (2025). FUDMA JOURNAL OF SCIENCES, 9(8), 198-209. https://doi.org/10.33003/fjs-2025-0908-3796

Issue

Vol. 9 No. 8 (2025): FUDMA Journal of Sciences - Vol. 9 No. 8

Section

Research Articles
Copyright & Licensing

FUDMA Journal of Sciences

How to Cite

HEAT AND MASS TRANSFER FLOW THROUGH POROUS MEDIUM WITH VARIABLE THERMAL CONDUCTIVITY AND SUCTION EFFECTS. (2025). FUDMA JOURNAL OF SCIENCES, 9(8), 198-209. https://doi.org/10.33003/fjs-2025-0908-3796