Numerical simulation of turbulent gas-particle flow in a 90degree bend: Eulerian-Eulerian approach
Numerical simulation of turbulent gas-particle flow in a 90degree bend: Eulerian-Eulerian approach
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DOI：
10.1016/j.compchemeng.2007.04.001
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发表时间：
2008-03
期刊：
影响因子：
--
通讯作者：
K. Mohanarangam;Z. Tian;Jiyuan Tu
中科院分区：
文献类型：
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作者：
K. Mohanarangam;Z. Tian;Jiyuan Tu
本文对方形截面90°弯曲内稀相气固两相流动的物理特性进行了数值研究。采用改进的欧拉双流体模型来预测气固两相流。将这两种方法的计算结果与Kliafas和Holt的LDV结果进行了比较，其中颗粒直径为50μm，流动雷诺数为3.47×105。湍流封闭采用基于RNG的κ-ε模型，求解附加的输运方程以考虑颗粒相湍流的气固相互作用和湍流动能。此外，使用当前的湍流模型配方，颗粒和组合的气体-颗粒湍流相互作用的更好的理解已经被证明。在目前的研究中使用的欧拉-欧拉模型被发现产生良好的协议与测量值。
A numerical investigation into the physical characteristics of dilute gas–particle flows over a square-sectioned 90° bend is reported. The modified Eulerian two-fluid model is employed to predict the gas–particle flows. The computational results using both the methods are compared with the LDV results of Kliafas and Holt, wherein particles with corresponding diameter of 50μm are simulated with a flow Reynolds number of 3.47×105. RNG-based κ–ɛ model is used as the turbulent closure, wherein additional transport equations are solved to account for the combined gas–particle interactions and turbulence kinetic energy of the particle phase turbulence. Moreover, using the current turbulence modelling formulation, a better understanding of the particle and the combined gas–particle turbulent interaction has been shown. The Eulerian–Eulerian model used in the current study was found to yield good agreement with the measured values.