Entropy Generation for Natural Convection in a Darcy – Brinkman Porous Cavity

The paper provides a numerical investigation of the entropy generation analysis due to natural convection in an inclined square porous cavity. The coupled equations of mass, momentum, energy and species conservation are solved using the Control Volume Finite-Element Method. Effect of medium permeability and inclination angle on entropy generation is analysed. It was found that according to the Darcy number and the porous thermal Raleigh number values, the entropy generation could be mainly due to heat transfer or to fluid friction irreversibility and that entropy generation reaches extremum values for specific inclination angles.

Authors:

• Ali Mchirgui
• Nejib Hidouri
• Mourad Magherbi
• Ammar Ben Brahim

Keywords:

• Porous media
• entropy generation
• convection
• numerical method.

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