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| Numerical investigation of natural convection in a square enclosure filled with porous medium on sinusoidal thermal boundary condition |
| Received:April 17, 2012 Revised:August 18, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201303011 |
| KeyWord:local thermal non-equilibrium model sinusoidal heating natural convection numerical simulation |
| Author | Institution |
| 吴峰 |
西北大学化工学院, 西安 |
| 王刚 |
兰州理工大学土木工程学院, 兰州 |
| 马晓迅 |
西北大学化工学院, 西安 |
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| Abstract: |
| Steady non-Darcian natural convection in a square cavity filled with heat-generating porous medium is studied numerically by adopting the local thermal non-equilibrium model,with SIMPLER algorithm in the spatial coordinates.The top and bottom walls are adiabatic,the left wall is partially heated and cooled by sinusoidal temperature profiles and the right wall temperature is kept uniform.The heat transfer in the square enclosure is investigated under different value of temperature fluctuant parameter and aspect ratio of the square enclosure.It is observed that the temperature near the left wall and local Nusselt number of the left wall varies periodically because of the sinusoidal boundary condition,there exists an optimal fluctuant parameter of N=1 which makes the heat transfer rate maximum in the square enclosure.Increasing aspect ratio is bad for natural convection and heat transfer in the square enclosure,also,low aspect ratio can weaken heat transfer of the square enclosure. |