Journal
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
Volume 73, Issue 4, Pages 222-240Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10407782.2018.1423773
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In this work, we study numerically the natural convection heat transfer and entropy generation characteristics inside a two-dimensional porous quadrantal enclosure heated nonuniformly from the bottom wall. The effect of Darcy number is significant in dictating the Nusselt number only for higher values of Rayleigh number and the variation is more profound for larger values of Darcy number. The variation of entropy generation rate is significant with the Darcy number only for higher values of Rayleigh number. The entropy generation due to heat transfer is the significant contributor of irreversibility at low values of Darcy number, while for larger values of Darcy number and Rayleigh number entropy generation due to fluid friction becomes dominant.
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