| 垂直上升圆管内等温气泡流动的总体平衡建模 |
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| 引用本文： | 王晓冬,张孜博,屠基元.垂直上升圆管内等温气泡流动的总体平衡建模[J].东北大学学报(自然科学版),2008,29(11):1629-1632. |
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| 作者姓名： | 王晓冬 张孜博 屠基元 |
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| 作者单位： | 1. 东北大学,机械工程与自动化学院,辽宁,沈阳,110004
2. 墨尔本皇家理工大学,航空、机械及制造学院,澳大利亚,维多利亚,墨尔本,3083 |
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| 基金项目： | 澳洲国家自然科学基金
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| 摘 要： | 对等温条件下垂直上升管内气泡的总体平衡(population balance)建模,提出了一种平均气泡数密度(ABND)方法.通过将平均气泡数密度传递方程引入到商业计算流体力学(CFD)软件ANSYS CFX10中来体现气泡的总体平衡.对湍流驱动下气泡自由碰撞以及湍流涡旋携带下撞击引起的气泡聚并和破裂效应采用Hibiki和Ishii提出的气泡聚并和破裂模型.对气泡流动中的基本变量:局部气含率和液体速度沿径向的分布进行了预测,并与Liu和Bankoff的实验数据进行了对比.预测结果和实测数据之间具有很好的一致性,证明了平均气泡数密度方法对气泡流动建模的适用性.
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| 关 键 词： | 气-液两相流 泡状流 CFD建模 总体平衡方法 模型验证 |
Population Balance Modelling of Isothermal Vertical Upward Bubbly Flow |
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| WANG Xiao-dong,CHEUNG Chi-pok,TU Ji-yuan.Population Balance Modelling of Isothermal Vertical Upward Bubbly Flow[J].Journal of Northeastern University(Natural Science),2008,29(11):1629-1632. |
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| Authors: | WANG Xiao-dong CHEUNG Chi-pok TU Ji-yuan |
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| Institution: | WANG Xiao-dong1,CHEUNG Chi-pok2,TU Ji-yuan2(1.School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110004,China,2.School of Aerospace,Mechanical & Manufacturing Engineering,RMIT University,Melbourne 3083,Australia.) |
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| Abstract: | An averaged bubble number density(ABND) approach was proposed for modelling the population balance of bubbles in a vertical tube under isothermal condition.The population balance was realized by incorporating the ABND transport equation into a commercial computational fluid dynamics(CFD) code ANSYS CFX 10.The coalescence and breakage effects of the gas bubbles due to random collision and impact of turbulent eddies were modeled using the mechanistic model proposed by Hibiki and Ishii.Local radial distributio... |
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| Keywords: | gas-liquid flow bubbly flow CFD modelling population balance approach model validation |
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