传热传质

Numerical Simulation of Heat and Momentum Transport at the Coupled Interface between a Rectangular Channel and Porous Media

  • WANG Ye ,
  • WU Jingyi ,
  • YANG Guang
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  • Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China

网络出版日期: 2023-11-30

基金资助

This work was supported by the National Natural Science Foundation of China (NSFC) under the contract Nos. 51906142 and 51936006.

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Numerical Simulation of Heat and Momentum Transport at the Coupled Interface between a Rectangular Channel and Porous Media

  • WANG Ye ,
  • WU Jingyi ,
  • YANG Guang
Expand
  • Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China

Online published: 2023-11-30

Supported by

This work was supported by the National Natural Science Foundation of China (NSFC) under the contract Nos. 51906142 and 51936006.

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

摘要

多孔材料由于其比表面积大、孔隙率可控等优点而广泛应用于相变传热装置中。在实际应用中,多孔介质内的流动和传热过程通常与通道内的湍流等过程相耦合。本文采用数值模拟方法,研究了多孔介质和矩形通道相互耦合形成的T型通道内的非均温混合流动过程,揭示了多孔材料的孔隙率、孔径等结构参数对耦合界面处流动及传热过程的影响。在孔隙尺度上分析了耦合界面处的热量及动量传递特性,建立了多孔介质的摩擦阻力系数和努塞尔数与雷诺数、孔隙率、孔径和速度比的函数关系式。基于孔隙尺度的模拟结果能够扩展到表征单元体尺度,进一步指导和修正表征单元体尺度的数值模型,保证其更高效计算速度的同时提高其准确性。

本文引用格式

WANG Ye , WU Jingyi , YANG Guang . Numerical Simulation of Heat and Momentum Transport at the Coupled Interface between a Rectangular Channel and Porous Media[J]. 热科学学报, 2022 , 31(2) : 332 -343 . DOI: 10.1007/s11630-022-1584-y

Abstract

Porous media have been extensively used for the enhancement of heat transfer, due to their large specific surface area. In many cases, the flow and heat transfer in porous media are also coupled with other flow patterns, such as the channel flow. This work investigates numerically a non-isothermal three-dimensional mixing process from a rectangular channel and a porous medium to reveal the influence of the structural parameters on the flow and heat transfer characteristics in the coupled system. The detailed heat and momentum transport behavior at the coupled interface are analyzed at the pore-scale. Correlations of the friction factor and the Nusselt number within the porous media are proposed as functions of the Reynolds number, porosity, velocity ratio, and pore size. Results from the pore-scale simulations are also used to improve the less-cost representative-elementary-volume-scale numerical model, which can be further used for the modeling of relevant engineering problems.

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