垂直上升圆管内等温泡状流的数值模拟  

NUMERICAL STUDY ON A SIMPLIFIED POPULATION BALANCE APPROACH FOR ISOTHERMAL BUBBLY FLOWS

作　　者：王晓冬[1,2] 张孜博[1] 屠基元[2] 

机构地区：[1]东北大学真空与流体工程研究中心,沈阳110004 [2]墨尔本皇家理工大学航空与机械工程学院,澳大利亚维多利亚3083

出　　处：《力学学报》2008年第4期441-446,共6页Chinese Journal of Theoretical and Applied Mechanics

基　　金：澳洲国家自然科学基金(DP0556095)~~

摘　　要：介绍了描述等温状态下垂直气泡流流动的总体平衡方法(population balance approach).将平均气泡数密度控制方程引入到双流体模型中实现总体平衡.介绍了描述气泡聚并与破裂机制的Yao和Morel理论模型以及Hibiki等人的实验方法.利用商业计算流体力学软件ANSYS CFX10,对圆管特定位置上的5个基本变量:气含率、气泡平均直径、相间表面积浓度以及气体和液体速度沿半径分布进行了模拟计算.预测结果与实验数据的比较表明,预测结果和实测数据之间有很好的一致性.Population balance approach was presented for isothermal bubbly flows. An averaged bubble number density was introduced into the three-dimensional two-fluid model to describe the evolution of the structure of the gas bubbles. Moreover, Yao and Morel theoretical models were introduced to account for the coalescence and breakage mechanisms of bubbles. A numerical approach for five variables in bubbly flows of different locations in a tube： void fraction, Sauter mean diameter, interracial area concentration, gas and liquid velocities, are carried out. The numerical results showed a good agreement with the experimental data from Hibiki et al.

关 键 词：气-液两相流 泡状流动 CFD建模 总体平衡方法 数值模拟 

分 类 号：O359.1[理学—流体力学]