Lift force in bubbly flow systems
Lift force in bubbly flow systems
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DOI：
10.1016/j.ces.2007.07.034
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发表时间：
2007-11
影响因子：
4.7
通讯作者：
T. Hibiki;M. Ishii
中科院分区：
文献类型：
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作者：
T. Hibiki;M. Ishii
从分散流系统三维模拟在许多工程领域的意义出发，人们对单粒子系统以及多粒子系统中的升力进行了广泛的研究。在这项研究中，通过考虑气泡变形对升力的影响，对单粒子系统中的升力进行了建模。该模型是根据颗粒雷诺数为3.68至78.8、粘性数为0.0435至0.203、Eötvös数为1.40至5.83范围内获得的现有数据最终确定的。粘性数由 μf/[ρfσσ/(gΔρ)]1/2 定义，其中 μf、ρf、σ、g 和 Δρ 分别是流体粘度、流体密度、表面张力、重力加速度和相间密度差。定性检验了该模型对更高粒子雷诺数系统（例如空气-水系统）的适用性。在单粒子系统中开发的升力模型已扩展到多粒子系统。定性检验了扩展升力模型的适用性。还讨论了阻力和升力之间的相似性。
From the significance of three-dimensional simulation of dispersed flow systems in many engineering fields, extensive study was conducted for lift force in a single particle system as well as a multiparticle system. In this study, the lift force in a single particle system was modeled by considering the effect of bubble deformation on the lift force. The model was finalized based on existing data obtained in the range of particle Reynolds number from 3.68 to 78.8, viscous number from 0.0435 to 0.203 and Eötvös number from 1.40 to 5.83. The viscous number is defined by μf/[ρfσσ/(gΔρ)]1/2where μf, ρf, σ, g and Δρ are, respectively, fluid viscosity, fluid density, surface tension, gravitational acceleration and density difference between phases. The applicability of the model to higher particle Reynolds number system such as an air–water system was qualitatively examined. The lift force model developed in a single particle system was extended to a multiparticle system. The applicability of the extended lift force model was qualitatively examined. The similarity between drag and lift forces were also discussed.