Three-dimensional numerical investigation of film boiling by the lattice Boltzmann method
Three-dimensional numerical investigation of film boiling by the lattice Boltzmann method
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DOI：
10.1080/10407782.2016.1277936
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
R. Sadeghi;Mostafa Safdari Shadloo
中科院分区：
文献类型：
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作者：
R. Sadeghi;Mostafa Safdari Shadloo
摘要 提出了三维晶格玻尔兹曼模型来模拟薄膜沸腾现象。研究了单模态和多模态薄膜沸腾。针对不同的雅各布数获得了气相周围的流场和温度场。此外，还研究了雅各布数对努塞尔数和蒸气尖端速度的影响。结果表明，随着雅各布数的增加，气泡尖端速度增加，而努塞尔数减少。此外，发现在多模态薄膜沸腾中，局部努塞尔数的峰值和谷值分别出现在气泡位置和相邻气泡之间的间隙谷处。
ABSTRACT A three-dimensional lattice Boltzmann model is presented to simulate the film-boiling phenomenon. Single- and multimode film boilings are investigated. The flow and temperature fields around the vapor phase are obtained for various Jakob numbers. Furthermore, the effects of Jakob number on the Nusselt number and vapor tip velocity are investigated. The results show that on increasing the Jakob number, the bubble tip velocity increases while the Nusselt number decreases. Furthermore, it is found that in multimode film boiling, the peak and trough values of the local Nusselt number happen at the bubble position and the gap valleys between adjacent bubbles, respectively.