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首页> 外文期刊>International Journal of Heat and Mass Transfer >Boundary conditions and wall effect for forced convection heat transfer in sintered porous plate channels
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Boundary conditions and wall effect for forced convection heat transfer in sintered porous plate channels

机译：烧结多孔板通道中强制对流换热的边界条件和壁效应

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摘要

Forced convection heat transfer of water and air in plate channels filled with sintered bronze porous media was simulated numerically using a local thermal non-equilibrium model with consideration of the wall effect caused by heat conduction in the plate wall and in the unheated section of the sintered porous media. The numerical model was used to analyze the effects of the assumed boundary conditions, the porosity at the wall and the wall effect caused by the heat conduction. The results showed that the wall porosity in sintered porous media is less than that in non-sintered packed beds, which intensifies the convection heat transfer in sintered porous media. The wall effect reduces the heat transfer coefficient near the front of the heated section and slightly increases the heat transfer coefficient near the end of the heated section. Numerical simulations of convection heat transfer of air and water in sintered bronze porous media using the local thermal non-equilibrium model and the variable porosity model with consideration of the wall effect corresponded well to the experimental data.
机译：考虑到由板壁和未加热部分的热传导引起的壁效应，使用局部热非平衡模型，对填充有烧结青铜多孔介质的板通道中水和空气的强迫对流传热进行了数值模拟。多孔介质。使用数值模型来分析假定的边界条件，壁的孔隙率和热传导引起的壁效应的影响。结果表明，烧结多孔介质中的壁孔率小于非烧结填充床中的壁孔率，这增强了烧结多孔介质中的对流传热。壁效应减小了在加热部分的前部附近的传热系数，并稍微增加了在加热部分的端部附近的传热系数。考虑壁效应的局部热非平衡模型和可变孔隙率模型对烧结青铜多孔介质中空气和水对流传热的数值模拟与实验数据吻合良好。

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