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化工进展  2015 

规整填料结构对液相分布影响的计算流体力学

DOI: 10.16085/j.issn.1000-6613.2015.11.008, PP. 3869-3878

Keywords: 计算流体力学,多相流,介尺度,规整填料结构,液相分布,流动形态

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Abstract:

提出了一种新型的拟循环边界条件,并采用计算流体力学(computationalfluiddynamics,CFD)中VOF(volumeoffluid)多相流模型对液相在两相邻规整填料特征单元上的分布进行三维仿真模拟,数值模拟结果与已有经验公式具有较好的吻合性。从介尺度的角度出发,系统地研究了规整填料的宏观结构和微观结构对液相在规整填料片上分布的影响。结果表明规整填料的波纹倾角和表面微观结构对液相特别是低表面张力物系在规整填料内的流动形态有很大的影响,而比表面积对液相在规整填料内的流型几乎无影响。相同液相流率下,液相在高比表面积、填料表面有波纹的Y型规整填料片上的分布较好,具有较好的流体力学性能。

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