Comment on "Radiative effect on natural convection flows in porous media, A.A. Mohammadein, M. A. Mansour, Sahar M. Abd El Gaied and Rama Subba Reddy Gorla [Transport in Porous Media 32:263-283, 1998]"

TL;DR

This paper comments on a study of natural convection in porous media, focusing on the inclusion of radiation effects and the use of perturbation methods, while also discussing some identified weaknesses.

Contribution

It provides a critique of previous work on radiation effects in natural convection flows within porous media, highlighting methodological and analytical limitations.

Findings

Highlights the use of perturbation methods for solving convection equations

Discusses the impact of radiation on heat transfer in porous media

Identifies weaknesses in the original study's approach

Abstract

In the above paper the authors treat the natural convection boundary layer flow in a Darcy-Brinkman-Forchheimer porous medium. In the energy equation the radiation effect has been taken into account. A two-parameter perturbation method is used for the solution of the equations. The first order results are presented in tables and figures. This is an interesting work but there are some weak points which are presented below: