Pore-scale numerical simulations of flow and convective heat transfer in a porous woven metal mesh
Pore-scale numerical simulations of flow and convective heat transfer in a porous woven metal mesh
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多孔金属编织网中流动和对流传热的孔隙尺度数值模拟
DOI：
10.1016/j.ces.2022.117696
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发表时间：
2022
影响因子：
4.7
通讯作者：
Jingyi Wu
中科院分区：
文献类型：
--
作者：
Guang Yang;Ran Xu;Ye Wang;Yutong Zhu;Feng Ren;Chunyu Li;Jingyi Wu
·从孔隙尺度研究了通过编织网的流体动力学。·通过与实验数据的比较，验证了数值模型的正确性。·详细研究了编织网孔内的流动模式。·摩擦系数的数值计算结果与解析结果之间的差异为5%。·提出了一种新的努塞尔数关联式。金属编织网由于其优异的物理性能在一些工程应用中受到了相当大的关注。宏观参数，如通过多孔结构的流动阻力和传热系数，已被广泛研究。然而，微观机制需要进一步分析。在这项研究中，一个数值模型，以评估在孔隙尺度上的多孔编织网的流体动力学和传热特性。通过与实验数据的比较，验证了模型的准确性.从速度、螺旋度和涡度方面对流型进行了全面研究。考察了流体性质对流动行为的影响。随着雷诺数的增加，网格下游的流动反向区域扩大。基于孔尺度数值模拟结果，推导了多孔编织网内对流换热的努塞尔数关联式。这项研究提供了一个编织网和框架内的流动物理的见解，以优化设计相关设备。
• The fluid dynamics through the woven mesh were studied from the pore scale. • The numerical model was verified in comparison with experimental data. • The flow patterns inside the pores of the woven mesh were studied in detail. • Difference between the numerical and the analytical results of friction factor is 5%. • A new correlation of the Nusselt number was proposed. Woven metal meshes have received considerable attention in several engineering applications owing to their excellent physical properties. Macroscopic parameters, such as flow resistance and heat transfer coefficient through the porous structure, have been extensively investigated. However, the microscale mechanism requires further analysis. In this study, a numerical model was developed to evaluate the fluid dynamics and heat transfer characteristics of a porous woven mesh at the pore scale. The accuracy of the model was verified by comparing the simulated results with experimental data. Flow patterns were comprehensively studied in terms of velocity, helicity, and vorticity. The effects of the fluid properties on the flow behavior were examined. The flow reversal region downstream of the mesh expanded as the Reynolds number increased. Based on the pore-scale numerical results, a Nusselt number correlation was derived for convective heat transfer in the porous woven mesh. This study provides insights into the flow physics within a woven mesh and a framework to optimally design related devices.