Numerical simulation of non-Fourier heat conduction in fins by lattice Boltzmann method

被引：22
|
作者：
Liu, Yi [1 ,2 ]
Li, Ling [1 ,2 ]
Zhang, Yuwen [3 ]
机构：
[1] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China
[2] Shanghai Key Lab Multiphase Flow & Heat Transfer, Shanghai, Peoples R China
[3] Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA
来源：
APPLIED THERMAL ENGINEERING | 2020年 / 166卷
关键词：
Lattice Boltzmann method; Non-Fourier heat conduction; Heat transfer and efficiency of fin; SPHERICAL GEOMETRY; INVERSE ANALYSIS; PERFORMANCE; MODEL;
D O I：
10.1016/j.applthermaleng.2019.114670
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The addition of fin to the surface of microelectronic elements is a very effective way to enhance their heat transfer rate. Since the heat generation of the microelectronic elements is very fast, the Fourier law is no longer valid and the non-Fourier effect must be considered when designing a fin. Cattaneo - Vemotte model (CV model) is the most common model that is used to describe the non-Fourier effect in heat conduction. The mathematical expression of the CV model is essentially a wave equation. The lattice Boltzmann method (LBM) can be used to solve the wave equation in the CV heat conduction problem. In this paper, LBM is used to solve the non-Fourier heat conduction in a fin under periodic boundary conditions. Effects of relaxation time, shape and the frequency of the base temperature oscillations on heat transfer efficiency are analyzed.
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收藏
页数：6
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