A differential constraint approach to obtain global stability for radiation induced double-diffusive convection in a porous medium

Hill, A. A. (2009) A differential constraint approach to obtain global stability for radiation induced double-diffusive convection in a porous medium. Mathematical methods in the applied sciences, 32 (8). pp. 914-921. ISSN 1099-1476

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Publisher's URL: http://dx.doi.org/10.1002/mma.1073

Abstract

The stability of double-diffusive porous convection with a concentration-based internal heat source is studied. Owing to the significant sensitivity of standard energy method, a highly desirable reduction in the number of required coupling parameters is achieved through the novel energy method of van Duijn et al. (Environmental Mechanics: Water, Mass and Energy Transfer in the Biosphere. American Geophysical Union: Washington, DC, 2002; 155–169). This approach incorporates the Darcy equation as a differential constraint, and has been shown by van Duijn et al. to generally yield sharper nonlinear results. Owing to the widespread use of coupling parameters in analysing porous media stability, this result strongly advocates the differential constraint approach for obtaining optimal nonlinear stability thresholds.

Item Type:	Article
Uncontrolled Keywords:	double-diffusive convection, energy method, porous media
Faculty/Department:	Faculty of Health and Life Sciences > Department of Applied Sciences ~Pre-2012 Faculty Structure > Faculty of Health and Life Sciences > Department of Applied Sciences
ID Code:	17529
Deposited By:	Dr A. Hill
Deposited On:	24 Oct 2012 15:15
Last Modified:	03 Dec 2012 19:16