Double-diffusive penetrative convection simulated via internal heating in an anisotropic porous layer with throughflow

Capone, F., Gentile, M. and Hill, A. A. (2011) Double-diffusive penetrative convection simulated via internal heating in an anisotropic porous layer with throughflow. International Journal of Heat and Mass Transfer, 54 (7-8). pp. 1622-1626. ISSN 0017-9310

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Publisher's URL: http://dx.doi.org/10.1016/j.ijheatmasstransfer.201...

Abstract

A model for double-diffusive convection in an anisotropic porous layer with a constant throughflow is explored, with penetrative convection being simulated via an internal heat source. Both linear instability and nonlinear stability analyses are performed to assess the suitability of linear theory to predict the destabilisation of the throughflow. It is shown that due to oscillatory instability modes, there are three distinct regions, where increasing the ascending throughflow from rest actually has a stabilising effect, before following the standard destabilisation and stabilisation pattern. This is a previously unobserved phenomenon. The agreement between the linear and nonlinear thresholds is substantial when a small descending throughflow is introduced, although this does deteriorate for ascending throughflow.

Item Type:Article
Uncontrolled Keywords:throughflow, energy method, internal heat source, anisotropic porous media
Faculty/Department:Faculty of Health and Applied Sciences > Department of Biological, Biomedical and Analytical Sciences
ID Code:17554
Deposited By: Dr A. Hill
Deposited On:24 Oct 2012 14:35
Last Modified:15 Jan 2014 09:49

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