Effect of sinusoidal variations of boundary conditions on unsteady double diffusive convection in a square enclosure filled with a porous medium
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 6 January 2012
Abstract
Purpose
The purpose of this paper is to deal with unsteady double diffusive natural convection in a square enclosure filled with a porous medium with various boundary condition effects in the presence of heat source or sink.
Design/methodology/approach
Finite difference method was employed to solve the dimensionless governing equations of the problem. The effects of governing parameters, namely, amplitude wave length ratio, dimensionless time parameter, Darcy number, buoyancy parameter and heat generation/absorption parameter on the streamlines, temperature and concentration contours, as well as Nusselt number and Sherwood number, were considered.
Findings
The sinusoidal variations of the temperature and concentration remove the singularities which appear in the case of fixed temperature and concentration.
Originality/value
The paper's results are validated by favorable comparisons with previously published results. The results of the problem are presented in graphical and tabular forms and discussed.
Keywords
Citation
Mansour, M.A., Abd‐Elaziz, M.M., Abdalla, R. and Elsayed, S. (2012), "Effect of sinusoidal variations of boundary conditions on unsteady double diffusive convection in a square enclosure filled with a porous medium", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 22 No. 1, pp. 129-146. https://doi.org/10.1108/09615531211188838
Publisher
:Emerald Group Publishing Limited
Copyright © 2012, Emerald Group Publishing Limited