含导热块封闭方腔自然对流格子玻尔兹曼模拟研究  

Lattice Boltzmann simulation of natural convection in a closed square cavity with heat conducting block

作　　者：郑竟波 杨伟林 陈磐[1] 韩奎 廉正阳 倪虎 

机构地区：[1]南京工程学院能源与动力工程学院,江苏南京211167

出　　处：《科学技术创新》2021年第17期41-45,共5页Scientific and Technological Innovation

基　　金：江苏省大学生实践创新训练计划项目(项目号201911276023Y)

摘　　要：采用格子Boltzmann方法,构建了内含导热块方腔自然对流的数学模型,进行了模型验证,并重点分析了瑞利数、导热块大小及位置对腔体流线分布和等温线分布的影响规律。结果表明,随着瑞利数的增加,其流场和温度场都会随之变化。但导热块大小变化时,其温度场变化不大。导热块位置对腔内流场温度场的影响很大,导热块位置偏上或者偏下,其涡产生的位置明显不同,腔内温度分布在导热块区域变为倾斜分布。The lattice Boltzmann method is used to construct a mathematical model of natural convection in a square cavity with heat conduction blocks.The developed code is validated against published works by numerical simulation for natural convection.The influence of Rayleigh number,size and location of heat conduction blocks on the streamline and isotherm distribution of the cavity is analyzed.The results show that the flow field and temperature field will change with the increase of Rayleigh number.However,when the size of the heat conducting block changes,the temperature field changes little.The position of the heat conduction block has a great influence on the temperature field of the flow field in the cavity.The position of the heat conduction block is higher or lower,and the position of the vortex is obviously different.The temperature distribution in the cavity becomes inclined in the heat conduction block area.

关 键 词：自然对流 瑞利数 导热块 格子BOLTZMANN模拟 

分 类 号：TK12[动力工程及工程热物理—工程热物理]