The linear stability of a developing thermal front in a porous medium: The effect of local thermal non-equilibrium

Reference:

Nouri-Borujerdi, A., Noghrehabadi, A. R. and Rees, D. A. S., 2007. The linear stability of a developing thermal front in a porous medium: The effect of local thermal non-equilibrium. International Journal of Heat and Mass Transfer, 50 (15-16), pp. 3090-3099.

Related documents:

Abstract

In this paper we analyze the stability of the developing thermal boundary layer which is induced by a step-change in the temperature of the lower horizontal boundary of a uniformly cold semi-infinite porous medium. Particular attention is paid to the influence of local thermal non-equilibrium between the fluid and solid phases and how this alters the stability criterion compared with corresponding criterion when the phases are in local thermal equilibrium. A full linear stability analysis is developed without approximation, and this yields a parabolic system of equations for the evolving disturbances. Criteria for the onset of convection are derived as a function of the three available nondimensional parameters, the inter-phase heat transfer coefficient, H, the porosity-scaled conductivity ratio, gamma, and the diffusivity ratio, alpha. (C) 2007 Elsevier Ltd. All rights reserved.

Export

Actions (login required)