Lattice Boltzmann simulation of heat and fluid flow in 3D cylindrical heat exchanger with porous blocks
Lattice Boltzmann simulation of heat and fluid flow in 3D cylindrical heat exchanger with porous blocks
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DOI：
10.1016/j.amc.2015.10.076
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发表时间：
2016-03
期刊：
影响因子：
--
通讯作者：
Fumei Rong;B. Shi;X. Cui
中科院分区：
文献类型：
--
作者：
Fumei Rong;B. Shi;X. Cui
在换热管内插入多孔块作为一种强化传热技术，在工程应用中得到了广泛的应用。为了获得最佳的传热效率，本文采用格子Boltzmann方法对多孔块圆柱管内的传热和流动进行了数值研究。研究了多孔块的宽度、高度、相邻多孔块之间的距离、达西数和孔隙率等参数对流体流动和温度场的影响。数值结果表明，多孔块高度变化对换热的影响比其他参数的影响更为明显。
Inserting porous blocks into heat exchange pipe as a technology for heat transfer enhancement is widely used in engineering applications. In order to get the optimal heat transfer efficiency, this work is devoted to the numerical investigation of heat and fluid flow in cylindrical pipe with porous blocks using lattice Boltzmann method. The effects of several parameters, such as the width and height of the porous blocks, the distance between two adjoining porous blocks, Darcy number and porosity on fluid flow and temperature field are investigated. The numerical results indicate that the heat transfer effect caused by the height variation of porous block is more obvious compared with the other parameters.