Development of three-dimensional vortex method for bubbly jet and parallel computing system

气泡射流三维涡流法及并行计算系统的研制

• 批准号: 16560143
• 负责人: UCHIYAMA Tomomi
• 金额: $ 1.73万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560143/
• 关键词: gas-liquid two-phase flow; vortex method; bubbly flow; parallel computation; vortical structure; phase distribution; Lagrange calculation; high-speed computation; 自由乱流; 体積率; Parallel Virtual Machine

(1) Development of parallel computing system for three-dimensional vortex methodA parallel computing method is constructed. It is based on the Parallel Virtual Machine. Eight personal computers are connected through a switching hub. When applying the system to the present computation, the high-speed computation is realized(2) Computation of bubbly flow around a rectangular cylinderTo verify the validity of the vortex method, the upward bubbly flow around a rectangular cylinder is simulated. The simulation demonstrated that the bubbles are entrained into the Karman vortex and that the vortex shedding frequency is lower than that for the single-phase flow. These results are favorably compared with the corresponding experiment.(3) Computation of bubble plumeThe bubble plume, induced by the bubbles rising in a tank, is simulated by the vortex method. It is found that large-scale vortices appear around the rising bubbles and that the induced water velocity satisfies the similarity distribution. It is also confirmed that the wavelength and amplitude for the plume agree well with the measured results.

(1)三维涡量法并行计算系统的研制构造了一种并行计算方法。它基于并行虚拟机。八台个人计算机通过一个交换集线器连接起来。（2）矩形柱泡状绕流的计算为了验证涡方法的有效性，对矩形柱上升泡状绕流进行了数值模拟。模拟结果表明，气泡被带入卡门涡，且卡门涡脱落频率低于单相流。这些结果与相应的实验结果进行了比较。(3)气泡羽流的计算用涡方法模拟了由气泡在水槽中上升引起的气泡羽流。结果表明，气泡上升时，气泡周围形成大尺度涡系，诱导流速满足相似分布。同时也证实了羽流的波长和振幅与实测结果吻合较好。

项目成果

Vortex Simulation for Bubble-Laden Free Turbulent Flow

充满气泡的自由湍流的涡流模拟

• 发表时间: 2004
• 期刊: Proc.Japan-U.S.Seminar on Two-Phase Flow Dynamics
• 作者: Uchiyama;T.;Degawa;T.;Takamatsu;Y.
• 通讯作者: Y.

Numerical Simulation of the Bubbly Flow around a Rectangular Cylinder by Vortex In Cell Method

涡流池法数值模拟矩形圆柱周围的气泡流

• 发表时间: 2005
• 期刊: Proc.Int.Conf.Jets, Wakes and Separated Flows
• 作者: Degawa;T.;Uchiyama;T.
• 通讯作者: T.

Numerical Simulation for Bubble-Laden Free Turbulent Flow by Vortex in Cell Method

涡流池法对含气泡自由湍流的数值模拟

• 发表时间: 2004
• 期刊: Proc.5th Int.Conf.Multiphase Flow CD-ROM
• 作者: Uchiyama;T.;Degawa;T.
• 通讯作者: T.

Numerical Simulation for Bubble-Laden Plane Mixing Layer by Vortex in Cell Method

含气泡平面混合层的涡池法数值模拟

• 发表时间: 2004
• 期刊: Proc.3rd Int.Sympo.Two-Phase Flow Modelling and Experimentation CD-ROM
• 作者: Uchiyama;T.;Degawa;T.
• 通讯作者: T.

Numerical Simulation of Bubble-Driven Plume by Vortex Method

涡流法气泡驱动羽流的数值模拟

• 发表时间: 2005
• 期刊: Proc. 3rd Int. Conf. Vortex Flows and Vortex Models
• 作者: Uchiyama;T.;Degawa;T.
• 通讯作者: T.