Data integrity resolving gas-solid interfacial heat transfer coefficient in porous media under low Reynolds number

IF 5.8 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Heat and Mass Transfer Pub Date : 2025-09-09 DOI:10.1016/j.ijheatmasstransfer.2025.127803

Zeyang Song , Jian Wang , Shaotang Hui , Renkun Dai

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引用次数: 0

Abstract

Inverse computation of gas-solid interfacial heat transfer coefficient (h_sg) in porous media has remained a challenging issue. This work proposes a method using data integrity of both solid (T_s) and gas (T_g) temperatures in porous media to resolve this issue. The data integrity is accomplished by simultaneous measurement of T_s and T_g developed in our previous work. h_sg is approximately solved by the discretized gas energy conservation equation in a central difference scheme implemented with data integrity of T_s and T_g. This solution takes advantages in reducing both computation cost and numerical uncertainty since only one unknown parameter is directly calculated from one equation. An empirical correlation of Nu = 0.001(Re^1.66Pr^1/3) (R² = 0.93) is established for low-Re gas flow in porous media (5 mm ≤ d_p ≤ 15 mm and 13 ≤ Re ≤ 133) based on in total 54 studied cases considering four variables of Darcy flux, particle size, porous medium, and heating temperature. The proposed method is validated by the consistent Nu correlations in the literature. This work gives a new perspective of data integrity to resolve the challenging inverse models for heat transfer in porous media.

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低雷诺数条件下多孔介质气固界面换热系数的数据完整性分析

多孔介质中气固界面换热系数（hsg）的反计算一直是一个具有挑战性的问题。本研究提出了一种利用多孔介质中固体（Ts）和气体（Tg）温度数据完整性的方法来解决这一问题。数据的完整性是通过在我们以前的工作中开发的Ts和Tg的同时测量来完成的。用离散气体能量守恒方程在中心差分格式下近似求解，实现了Ts和Tg的数据完整性。该方法只需要从一个方程中直接计算一个未知参数，既降低了计算成本，又降低了数值不确定性。在考虑达西通量、粒径、多孔介质和加热温度4个变量的54个研究案例中，建立了低Re气体在5 mm≤dp≤15 mm和13≤Re≤133的多孔介质中流动的经验相关性Nu = 0.001(Re1.66Pr1/3) （R2 = 0.93）。文献中一致的Nu相关性验证了该方法的有效性。这项工作为解决多孔介质中具有挑战性的传热逆模型提供了数据完整性的新视角。

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来源期刊

International Journal of Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer