典型文献
Lattice Boltzmann study of three-dimensional immiscible Rayleigh-Taylor instability in turbulent mixing stage
文献摘要：
In this paper,we numerically studied the late-time evolutional mechanism of three-dimensional(3D)single-mode immiscible Rayleigh-Taylor insta-bility(RTI)by using an improved lattice Boltzmann multiphase method im-plemented on graphics processing units.The influences of extensive dimen-sionless Reynolds numbers and Atwood numbers on phase interfacial dy-namics,spike and bubble growth were investigated in details.The long-time numerical experiments indicate that the development of 3D single-mode RTI with a high Reynolds number can be summarized into four dif-ferent stages:linear growth stage,saturated velocity growth stage,reaccel-eration stage and turbulent mixing stage.A series of complex interfacial structures with large topological changes can be observed at the turbulent mixing stage,which always preserve the symmetries with respect to the middle axis for a low Atwood number,and the lines of symmetry within spike and bubble are broken as the Atwood number is increased.Five statistical methods for computing the spike and bubble growth rates were then analyzed to reveal the growth law of 3D single-mode RTI in turbulent mixing stage.It is found that the spike late-time growth rate shows an overall increase with the Atwood number,while the bubble growth rate experiences a slight decrease with the Atwood number at first and then basically maintains a steady value of around 0.1.When the Reynolds number decreases,the later stages cannot be reached gradually and the evolution of phase interface presents a laminar flow state.
文献关键词：
中图分类号：
作者姓名：
Bin Liu;Chunhua Zhang;Qin Lou;Hong Liang
作者机构：
Department of Physics,Hangzhou Dianzi University,Hangzhou 310018,China;Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen 518055,China;School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
文献出处：
引用格式：
[1]Bin Liu;Chunhua Zhang;Qin Lou;Hong Liang-.Lattice Boltzmann study of three-dimensional immiscible Rayleigh-Taylor instability in turbulent mixing stage)[J].物理学前沿,2022(05):107-118
A类：
reaccel
B类：
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AB值：
0.510877
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