Numerical analysis of entropy generation due to natural convection in three-dimensional partially open enclosures

Abstract Three-dimensional computational analysis of entropy generation due to natural convection in partially open enclosure has been performed in this work by using finite volume method. A written computer code was developed to solve governing equations of this three-dimensional problem. The study has been performed for different governing parameters such as opening ratio 0. 25 ≤  h  ≤ 0.75, center of opening 0.25 ≤  d  ≤ 0.75 and Rayleigh number 10 3 ≤ Ra ≤ 10 5 . It is observed that edge of openings is the most effective parameter on entropy generation and after comparing many cases, both the highest heat transfer and entropy generation were observed for the fully opened cavity.

[1]  Hakan F. Oztop,et al.  A review on entropy generation in natural and mixed convection heat transfer for energy systems , 2012 .

[2]  E. Bilgen,et al.  Conjugate heat transfer in inclined open shallow cavities , 2003 .

[3]  Mikhail A. Sheremet,et al.  Conjugate natural convection combined with surface thermal radiation in a three-dimensional enclosure with a heat source , 2014 .

[4]  H. Sajjadi,et al.  Lattice Boltzmann simulation of natural convection in an open enclosure subjugated to water/copper nanofluid , 2012 .

[5]  N. Abu‐Hamdeh,et al.  Three dimensional analysis of natural convection and entropy generation in a sharp edged finned cavity , 2016 .

[6]  H. Oztop,et al.  Second law analysis in a three dimensional lid-driven cavity , 2011 .

[7]  E. Bilgen,et al.  Natural convection in an open square cavity with slots , 2008 .

[8]  H. F. Nouanegue,et al.  Conjugate heat transfer by natural convection, conduction and radiation in open cavities , 2008 .

[9]  E. Bilgen,et al.  Laminar natural convection in inclined open shallow cavities , 2002 .

[10]  Ioan Pop,et al.  Analysis of Entropy Generation in Natural Convection of Nanofluid inside a Square Cavity Having Hot Solid Block: Tiwari and Das' Model , 2015, Entropy.

[11]  M. Sheremet.  Unsteady Conjugate Natural Convection in a Three-Dimensional Porous Enclosure , 2015 .

[12]  Adrian Bejan,et al.  Second-Law Analysis in Heat Transfer and Thermal Design , 1982 .

[13]  Hakan F. Oztop,et al.  Natural convection heat transfer in partially open inclined square cavities , 2005 .

[14]  P. Quéré,et al.  The entropy generation analysis in the mixed convective assisting flow of Cu–water nanofluid in an inclined open cavity , 2015 .

[15]  N. Abu‐Hamdeh,et al.  A computational work on a three dimensional analysis of natural convection and entropy generation in nanofluid filled enclosures with triangular solid insert at the corners , 2016 .

[16]  Hakan F. Oztop,et al.  Numerical study of three-dimensional combined buoyancy and thermocapillary convection and evaluation of entropy generation , 2013 .

[17]  E. Holzbecher.  FREE CONVECTION IN OPEN-TOP ENCLOSURES FILLED WITH A POROUS MEDIUM HEATED FROM BELOW , 2004 .

[18]  Hakan F. Oztop,et al.  Influence of exit opening location on mixed convection in a channel with volumetric heat sources , 2010 .

[19]  Antonio Sánchez Kaiser,et al.  3D effects in numerical simulations of convective flows in cubical open cavities , 2014 .

[20]  Ioan Pop,et al.  Entropy generation in Marangoni convection flow of heated fluid in an open ended cavity , 2011 .

[21]  R. Bharti,et al.  Lattice Boltzmann analysis of natural convection in a partially heated open ended enclosure for different fluids , 2015 .