Numerical simulation of fluid flow and convection heat transfer in sintered porous plate channels
Numerical simulation of fluid flow and convection heat transfer in sintered porous plate channels
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DOI：
10.1016/j.ijheatmasstransfer.2005.10.026
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发表时间：
2006-05-01
影响因子：
5.2
通讯作者：
Lu, XC
中科院分区：
文献类型：
--
作者：
Jiang, PX;Lu, XC
对烧结青铜多孔板通道中的流体流动和水的对流换热进行了数值研究。数值模拟假设由具有小接触面积的均匀尺寸颗粒和有限厚度的壁形成的简单立方结构，其表面受到恒定热通量的影响，这反映了实验设置。根据修正的达西模型对渗透率和惯性系数进行了数值计算。数值计算结果与众所周知的相关结果一致。计算得到的板通道表面局部传热系数与实验数据吻合较好，随质量流量的增加而增大，沿轴向略有减小。数值结果预测固体颗粒与流体之间的对流换热系数以及多孔介质中的体积换热系数随着质量流量的增加而增大，随着颗粒直径的增大而减小。数值结果还说明了固体颗粒和流体之间的温差，这表明多孔介质中的局部热不平衡。 (c) 2005 Elsevier Ltd. 保留所有权利。
Fluid flow and convective heat transfer of water in sintered bronze porous plate channels was investigated numerically. The numerical simulations assumed a simple cubic structure formed by uniformly sized particles with small contact areas and a finite-thickness wall subject to a constant heat flux at the surface which mirrors the experimental setup. The permeability and inertia coefficient were calculated numerically according to the modified Darcy's model. The numerical calculation results are in agreement with well-known correlation results. The calculated local heat transfer coefficients on the plate channel surface, which agreed well with the experimental data, increased with mass flow rate and decreased slightly along the axial direction. The convection heat transfer coefficients between the solid particles and the fluid and the volumetric heat transfer coefficients in the porous media predicted by the numerical results increase with mass flow rate and decrease with increasing particle diameter. The numerical results also illustrate the temperature difference between the solid particles and the fluid which indicates the local thermal non-equilibrium in porous media. (c) 2005 Elsevier Ltd. All rights reserved.