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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., {"references":["A. K. Sen , Natural convection in a shallow porous cavity-the Brinkman\nmodel, int. J. Heat Mess Tran., 5. pp. 855-868. May1987.","Lauriat, G., Prasad, V., Natural convection in a vertical porous cavity: a\nnumerical study for Brinkman-extended Darcy formulation. J. Heat.\nTrans. 109, pp 688-696 Aug. (1987).","P. Alam, S. R. Ansari, and R. Kumar, Numerical study on natural\nconvection in a porous cavity due to patial heating and cooling at\nvertical walls, Int. J. of Appl. Math. and Mech. Vol. 7(18): pp1-21, feb.\n2011.","M. S. Selamat, I. Hashim, M. K. Hasan, transient Natural Convection in\nPorous Square Cavity Heated and Cooled on Adjacent Walls, Math.\nProb. in Eng.Vol 2012, jan. 2012.","B.C. Nader , B.B. Brahim , L. Taieb, Influence of thermal boundary\nconditions on natural convection in a square enclosure partially heated\nfrom below. Int. Comm. in Heat and Mass Trans., vol. 34, pp. 369-379,\nMar.2007.","Shiina, Y., Hishida, M.: Critical Rayleigh number of natural convection\nin high porosity anisotropic horizontal porous layers, Int. J. of Heat and\nMass Trans., Vol 53, pp 1507-1513 Mar. 2010.","A. C. Baytas, optimisation in an inclined enclosure for minimum entropy\ngeneration in natural convection. j. Non-Equilib. Thermodyn. Vol 22, pp\n145-155, Oct.1997.","A. C.Baytas, Entropy generation for natural convection in an inclined\nporous cavity. Int. J. Heat and mass Trans. Vol 43, pp 2089-2099,\nJun.2000.","Famouri, M., Hooman, K.,Entropy generation for natural convection by\nheated partitions in a cavity. Int. Com. in Heat and Mass Trans. Vol 35,\npp 492-502, Apr. 2008.\n[10] N.Hidouri, H. abbassi, M. Magherbi, A. Ben Brahim, Entropy generation\nin double diffusive convection in presence of the Soret effect, progress\nin computational fluid dynamics, Vol. 7, 5 , pp 237 - 246, Jun.2007.\n[11] Hidouri, N., Ben Brahim, A. Influence of Soret and Dufour effects on\nentropy generation in transient double diffusive convection, Int. J.\nExergy, 7, 4, 454-481, Jun. 2010.\n[12] A. Mukhopadhyay, Analysis of entropy generation due to natural\nconvection in square enclosures with multiple discrete heat sources, Int.\nComm. in Heat and Mass Transfer vol.37, pp867-872, Aug. 2010.\n[13] I. Zahmatkesh, on the importance of thermal boundary conditions in heat\ntransfer and entropy generation for natural convection inside a porous\nenclosure, Int. J. of Ther. Sci., 47, pp 339-346, Mar. 2008.\n[14] K. Hooman, F. Hooman, S. R. Mohebpour, Entropy generation for\nforced convection in a porous channel with isoflux or isothermal walls.\nInt. J. Exergy. Vol.5, pp 78-96, Jan. 2008.\n[15] H. J. Saabas, B.R. Baliga, Co-located equal-order control-volume finiteelement\nmethod for multidimensional incompressible fluid flow. Part I:\nFormulation. Numer. Heat Transfer Pt. B-Fund.vol 26, 381-407, Jan.\n1994.\n[16] R. Younsi, A. Harkati, D. Kalache, Numerical simulation of double\ndiffusive natural convection in a porous cavity: opposing flow. The\nArabian J. for Sci. and Eng. Vol 27, pp181-194, Dec. 2002.\n[17] P. Nithiarasu, K.N Seetharamu, T. Sundararajan, Double-diffusive\nnatural convection in an enclosure filled with fluid- saturated porous\nmedium: a generalized non-Darcy approach. Num. Heat Trans. Vol 30,\npp 413- 426, Mar.1996."]}