In-cavity mixed convection simulation based on ventilation and internal heat source parameters

被引：0
|
作者：
Sun M. [1 ]
Song G. [1 ]
Zhou S. [1 ]
Dong Z. [2 ]
机构：
[1] School of Mechanical Engineering & Automation, Northeastern University, Shenyang
[2] School of Mechanical Engineering, Shenyang University of Technology, Shenyang
来源：
Song, Guiqiu (guiqiusong@126.com) | 1600年 / Editorial Board of Journal of Harbin Engineering卷 / 42期
关键词：
Coupled algorithm; Finite difference method; Heat transfer; Mixed convection; MRT-LBM; Positions of inlet and outlet; Shape of heat-generating element; Square cavity;
D O I：
10.11990/jheu.201905105
中图分类号：
学科分类号：
摘要：
To consider the influence of heat source shape and ventilation condition on fluid flow in a cavity and its heat transfer performance, mixed convection in the ventilated square cavity with a central heat-generating element was studied. The coupled algorithm of the multi-relaxation time model lattice Boltzmann method (MRT-LBM) and finite difference method (FDM) were used. Under different positions of inlet and outlet and different shapes of heat source, the flow, temperature, and heat transfer characteristics of mixed convection were analyzed, and the flow line distributions, isotherms, and Nusselt number of the heat-generating surface were given. Simulation results indicated that, when the locations of the inlet and outlet are fixed, the shape of the heat source determines the local convection heat transfer intensity but has little influence on the temperature field; the average Nusselt number increases with increasing radius R, and reaches its maximum value when the inlet is located at the middle and the outlet at the top. Copyright ©2021 Journal of Harbin Engineering University.
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页码：273 / 279
页数：6
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