Direct numerical simulation of rising bubble interaction with free surface using level contour reconstruction method

被引：0
作者：
Seungwon Shin
机构：
[1] Hongik University,School of Mechanical and System Design Engineering
来源：
Journal of Mechanical Science and Technology | 2012年 / 26卷
关键词：
Numerical simulation; Multiphase flow; Bubble rising; Top free surface; Front tracking; Level set;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Bubble rising phenomenon is widely found in many engineering applications including stream generators in power plants. Many experimental and numerical researches have been performed to predict the dynamic behavior of the bubble rising process. Most simulations so far have focused on evolution behavior of the rising bubble itself. Rising bubbles could penetrate through the top free surface which makes the problem much more complicated in addition to the curvature effect on the interface. With top surface, satellite droplets may be generated near breakup region and entrained to rising velocity field. In this paper, the effect of top free surface on rising bubble has been numerically investigated. High-order tetra-marching level contour reconstruction method (LCRM), which is a hybridization of fronttracking and level-set methods has been used to track the gas-liquid interface explicitly. Effects of free surface on the interfacial shape and behavior after breakup are studied with different size and depth of the initial bubble. It has been found that the initial diameter of the bubble is the dominant factor controlling the satellite droplet formation.
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页码：3141 / 3148
页数：7
相关论文
共 43 条
  • [1] Ryskin G.(1984)Numerical simulation of freeboundary problems in fluid mechanics. Part 2 J. Fluid Mech. 148 19-35
  • [2] Leal L. G.(1998)Direct numerical simulation of bubbly flows. Part 1. Low Reynolds number arrays J. Fluid Mech. 377 313-345
  • [3] Esmaeeli A.(1999)Direct numerical simulation of free-surface and interfacial flow Ann. Rev. Fluid Mech. 31 567-603
  • [4] Tryggvason G.(2001)Level set methods: An overview and some recent results J. Comput. Phys. 169 463-502
  • [5] Scardovelli R.(2012)A least square weighted residual method for level set formulation Int. J. Numerical Methods in Fluids 68 887-904
  • [6] Zaleski S.(2000)A coupled level set and volume-of-fluid method for computing 3D and axisymmetric incompressible two-phase flows J. Comput. Phys. 162 301-337
  • [7] Osher S.(2002)A coupled level set method and volume of fluid method for the buoyancy-driven motion of fluid particles Int. J. of Numerical Heat Transfer 42 523-542
  • [8] Fedkiw R. P.(2008)Numerical study of droplet motion in a microchannel with different contact angles Journal of Mechanical Science and Technology 22 2590-2599
  • [9] Choi H. G.(2002)A hybrid particle level set method for improved interface capturing J. Comput. Phys. 183 83-116
  • [10] Sussman M.(2003)A mixed markers and volume-of-fluid method for the reconstruction and advection of interfaces in two-phase and free-boundary flows J. Comput. Phys. 188 611-639
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