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科学通报  2014 

气固两相交叉射流相间传热的LBE-DEM模拟

DOI: 10.1360/csb2014-59-13-1258, PP. 1258-1266

Keywords: 交叉射流,气固两相流,格子Boltzmann方法,离散单元法两相传热

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Abstract:

采用格子波尔兹曼/离散元(LBE-DEM)耦合方法模拟气固两相交叉射流相间传热,重点考察了流体和颗粒之间的热量双向耦合及其对两相传热过程的影响.流场雷诺数Re=1000,在相同颗粒数目下选取了10,25,50三种Stokes数.研究分析了气固多相交叉射流中气相温度分布,颗粒群分布形态特性以及相间的双向耦合传热特性及其影响因素.研究发现交叉射流两相传热过程在撞击前期和后期分别受两相平均温差和两相换热系数的主导,而其主导因素的转换与颗粒动态响应特性有关.

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