本文通过理论分析、数值模拟与实验研究的综合，研究了粘性耗散及变物性对多孔介质中对流换热的影响。发现：用理想的等热流边界条件可以较好地数值模拟等热流边界条件下多孔介质中的对流换热；在实际可实现的参数条件下，粘性耗散对多孔介质中对流换热的影响不大；油的变物性对换热的影响很大---热流密度越高，对流换热越强
The effect of viscous dissipation, thermal dispersion, particle diameters andvariable properties of oil on convection heat transfer are investigatednumerically using a thermal non-equilibrium model in comparison with experimentaldata in this paper. It is shown that under practical conditions the influence ofviscous dissipation on the convection heat transfer is small. Fluid temperatureon the bottom part of the channel is higher than in the core region of thechannel when the lower plate is adiabatic due to the effect of viscousdissipation. The variation of the thermal physical properties of oil has aprofound influence on the convection heat transfer coefficient, whichincreases as the heat flux increases
参考文献
| [1] | The effect of viscous dissipation thermal dispersion particle diameters andvariable properties of oil on convection heat transfer are investigatednumerically using a thermal non-equilibrium model in comparison with experimentaldata in this paper. It is shown that under practical conditions the influence ofviscous dissipation on the convection heat transfer is small. Fluid temperatureon the botto[M]. |
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