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Numerical Analysis on Effects of Wall Structures on Bubble Groups

WANG Jincheng GUAN Hui WEI Zhijun WU Chuijie

王金城,关晖,卫志军,吴锤结. 壁面结构对三维可压缩气泡群影响的数值模拟研究 [J]. 应用数学和力学,2022,43(1):49-62 doi: 10.21656/1000-0887.420041
引用本文: 王金城,关晖,卫志军,吴锤结. 壁面结构对三维可压缩气泡群影响的数值模拟研究 [J]. 应用数学和力学,2022,43(1):49-62 doi: 10.21656/1000-0887.420041
WANG Jincheng, GUAN Hui, WEI Zhijun, WU Chuijie. Numerical Analysis on Effects of Wall Structures on Bubble Groups[J]. Applied Mathematics and Mechanics. doi: 10.21656/1000-0887.420041
Citation: WANG Jincheng, GUAN Hui, WEI Zhijun, WU Chuijie. Numerical Analysis on Effects of Wall Structures on Bubble Groups[J]. Applied Mathematics and Mechanics. doi: 10.21656/1000-0887.420041

壁面结构对三维可压缩气泡群影响的数值模拟研究

doi: 10.21656/1000-0887.420041
详细信息
  • 中图分类号: O35

Numerical Analysis on Effects of Wall Structures on Bubble Groups

  • 摘要: 基于流体体积(VOF)方法追踪自由液面,研究了壁面结构对三维可压缩气泡群流动的影响。通过在待测壁面上设置不同形状的壁面结构(长方体、椭球体和圆锥体)并改变它们各自的几何参数(位置和长度),来研究壁面结构对壁面附近的气泡群流动的影响,该影响表现为气泡群对壁面的空间平均压力。研究发现,壁面结构对气泡群的拓扑结构的影响会造成壁面压力的变化,其中长方体壁面结构降低壁面平均压力的效果最好,且通过适当调整该结构的位置和长度,能使壁面的压力脉动现象消失。
  • Figure  1.  Geometry and mesh of the computational domain with ellipsoids, cuboids and cones:(a) ellipsoidal wall structures;(b) cuboidal wall structures;(c) conical wall structures

    Figure  2.  Initial configuration of the static water column (ellipsoidal wall structures)

    Figure  3.  Comparison between the results of the codes used in this study and the experimental data[23]

    Figure  4.  Comparison of the results from cases where grid numbers are 65 536, 524 388 and 1 769 472, respectively:(a) 0~5 s;(b) 0.4~1.5 s

    Figure  5.  The impact process of wall structures, water and bubbles: (a) initial state; (b) before generation of bubbles; (c) generation of bubbles

    Figure  6.  Wall pressure evolution in the case where ellipsoid height Lz = 0.1 m

    Figure  7.  Pressure and density distributions along the sample line at 0.5 s: (a) the sample line (white); (b) the pressure along the sample line; (c) the density along the sample line

    Figure  8.  Pressure and density distributions along the sample line at 0.57 s: (a) the sample line (white); (b) the pressure along the sample line;(c) the density along the sample line

    Figure  9.  Wall pressure evolutions: (a) the cases with ellipsoid height Lz = 0.2~0.8 m; (b) the case with Lz = 0.4 m and the no-ellipsoid case

    Figure  10.  Wall pressure evolutions and flow fields in the cases with ellipsoid height Lz = 0.1~0.3 m

    Figure  11.  Wall pressure evolutions and flow fields in the cases with ellipsoid height Lz = 0.5~0.7 m

    Figure  12.  Wall pressure evolutiond in the cases with ellipsoid height Ls = 0.2~0.4 m

    Figure  13.  The flow field in the ellipsoid wall structure case with ellipsoid height Ls = 0.4 m

    Figure  14.  Wall pressure evolution in cases with cuboid height Lz=0.1~0.8 m

    Figure  15.  Wall pressure evolution in cases with cuboid height Lz=0.15~0.25 m

    Figure  16.  The flow field in the cuboidal wall structure case with height Lz=0.2 m

    Figure  17.  Wall pressure evolutions in the cases with cuboid length Ly=0.1~0.5 m

    Figure  18.  The flow field in the cuboidal wall structure cases with cuboid heights Lz = 0.2 m and Ly = 0.5 m: (a) the flow profile; (b) the bubble contour

    Figure  19.  Wall pressure evolutions in the cases with cone lengths Lz = 0.1~0.8 m

    Figure  20.  Wall pressure evolutions in the cases with cone lengths Lz=0.2~0.45 m

    Table  1.   Boundary conditions of each variable

    wall boundary conditionoutlet boundary condition
    liquid phase fractionalzero gradientinlet outlet
    pressurebuoyant pressuretotal pressure
    velocityfixed valuepressure inlet outlet velocity
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出版历程
  • 收稿日期:  2021-02-20
  • 修回日期:  2021-05-09
  • 网络出版日期:  2021-12-15

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