Viscous and Joule heating effects on forced convection flow from radiate isothermal porous surfaces

Abstract

Purpose

To highlight the effect of viscous and Joule heating on different ionized gases in the presence of magneto and thermal radiation effects.

Design/methodology/approach

The conservation equations are written for the MHD forced convection in the presence of thermal radiation. The governing equations are transformed into non‐similar form using a set of dimensionless variables and then solved numerically using Keller box method.

Findings

The increasing of fluid suction parameter enhances local Nusselt numbers, while the increasing of injection parameter decreases local Nusselt numbers. The inclusion of thermal radiation increases the heat transfer rate for both ionized gases suction or injection. The presence of magnetic field decreases the heat transfer rate for the suction case and increases it for the injection case. Finally, the heat transfer rate is decreased due to viscous dissipation.

Research limitations/implications

The combined effects of both viscous and Joule heating on the forced convection heat transfer of ionized gases for constant surface heat flux surfaces can be investigated.

Practical implications

A very useful source of coefficient of heat transfer values for engineers planning to transfer heat by using ionized gases.

Originality/value

The viscous and Joule heating of ionized gases on forced convection heat transfer in the presence of magneto and thermal radiation effects are investigated and can be used by different engineers working on industry.

Citation

Duwairi, H.M. (2005), "Viscous and Joule heating effects on forced convection flow from radiate isothermal porous surfaces", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 15 No. 5, pp. 429-440. https://doi.org/10.1108/09615530510593620