Permeability, Form Drag Coefficient and Heat Transfer Coefficient of Porous Copper
Permeability, Form Drag Coefficient and Heat Transfer Coefficient of Porous Copper
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DOI：
10.1080/01457632.2020.1723841
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发表时间：
2020-03
影响因子：
2.3
通讯作者：
J. Baloyo;Yuyuan Zhao
中科院分区：
文献类型：
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作者：
J. Baloyo;Yuyuan Zhao
对碳酸盐烧结法制备的多孔铜样品的透水性、形状阻力系数和换热系数进行了测试和分析。随着孔隙率的增加和孔径的减小，渗透率增大，形状阻力系数减小。形状阻力系数与渗透率之间存在经验关系。当最佳孔隙率为60%时，导热和对流换热平衡，换热系数最大。较大的孔径导致较高的换热系数，这是因为弯曲程度增加，对流换热增强。当孔隙率为65%时，高Nusselt数和低摩擦因数组合的整体换热性能最好。
Abstract The water permeability, form drag coefficient and heat transfer coefficient of porous copper samples manufactured by the Lost Carbonate Sintering process were measured and analyzed. The permeability increased and the form drag coefficient decreased with increasing porosity and decreasing pore size. There existed an empirical relationship between the form drag coefficient and the permeability. The highest heat transfer coefficient was observed at an optimum porosity of 60%, where heat removal by conduction and convection was balanced. Larger pore sizes led to higher heat transfer coefficients due to increased tortuosity and enhanced heat transfer by convection. The best overall heat transfer performance with a combination of high Nusselt number and low friction factor was achieved at the porosity of 65%.