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Influence of interface instability on liquid mixing process in closed container


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Influence of interface instability on liquid mixing process in closed container
Chai Mingming1Li Lei12Lu Xiaoxia1Zhao Shoutian1
1.State Key Laboratory of NBC Protection for Civilian,Beijing 102205,China; 2.School of Aerospace Engineering,Tsinghua University,Beijing 100084,China
high-speed photography planar laser induced fluorescence interface instability Atwood numbers aspect ratios
The influence of interface instability on the liquid mixing process in a cylinder container is studied experimentally by using the high-speed photography and the planar laser induced fluorescence(PLIF)technology.The evolution of interface instability is calculated by applying the multiphase fluid flow and turbulence models.The influence of different Atwood numbers and aspect ratios on the liquid mixing processes is analyzed.The results show that the evolution of interface instability is helpful for the liquid mixing process.The mixing time increases with the increasing of Atwood numbers,meanwhile the heavy liquid is hard to be mixed on the bottom of container.Entirely,the bigger the aspect ratios are,the better the mixing effects are.As the aspect ratios decreasing,the mixing eddies are hard to form during the rolling over process of the lighter liquid,and some remains of unmixing lighter liquid exist.


[1] 游定方,林琅,刘治碧.液体炸药的发展及应用[J].化工技术与开发,2011(1):37-39.
You Dingfang,Lin Lang,Liu Zhibi.Development and application of liquid explosives[J].Technology & Development of Chemical Industry,2011(1):37-39.
[2]Voeobev A.Boussinesq approximation of the Cahn-Hilliard Navier-Stokes equations[J].Physical Review E,2010,82(5):056312.
[3]Voeobev A.Dissolution dynamics of miscible liquid/liquid interfaces[J].Current Opinion in Colloid & Interface Science,2014,19(4):300-308.
[4]Kim J.A continuous surface tension force formulation for diffuse-interface models[J].Journal of Computational Physics,2005,204(2):784-804.
[5]Brackbill J U,Kothe D B,Zemach C.A coutinuum method for modeling surface tension[J].Journal of Computational Physics,1992,100:335-354.
Wang Wentan,Zhang Mengxue,Zhao Shufang.Application of laser-induced fluorescence technique in visualization of liquid mixing process[J].CIESC Journal,2013,64(3):771-778.
[7]Kim J.Phase field computations for ternary fluid flows[J].Computer Methods in Applied Mechanics and Engineering,2007,196(45-48):4779-4788.
[8]Sharp D H.An overview of Rayleigh-Taylor instability[J].Physica D:Phenomena,1984,12(1-3):3-10.
Li Xi,Zhu Huaqing.Experimantal and numerical study of Rayleigh-Taylor instabilities[J].Science & Technology Review,2005,23(11):30-32.
[11]Kim J.Phase-field models for multi-component fluid flows[J].Communications in Computational Physics Commun,2012,12(3):613-661.


Last Update: 2016-10-30