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题名: Discrete Boltzmann modeling of multiphase flows: hydrodynamic and thermodynamic non-equilibrium effects
作者: Gan, YB;  Xu, AG;  Zhang, GC;  Succi, S
刊名: SOFT MATTER
出版日期: 2015
卷号: 11, 期号:26, 页码:5336-5345
学科分类: Chemistry ;  Materials Science ;  Physics ;  Polymer Science
DOI: http://dx.doi.org/10.1039/c5sm01125f
通讯作者: Xu, AG (reprint author), Inst Appl Phys & Computat Math, Natl Key Lab Computat Phys, POB 8009-26, Beijing, Peoples R China.
文章类型: Article
英文摘要: A discrete Boltzmann model (DBM) is developed to investigate the hydrodynamic and thermodynamic non-equilibrium (TNE) effects in phase separation processes. The interparticle force drives changes and the gradient force, induced by gradients of macroscopic quantities, opposes them. In this paper, we investigate the interplay between them by providing a detailed inspection of various non-equilibrium observables. Based on the TNE features, we define TNE strength which roughly estimates the deviation amplitude from the thermodynamic equilibrium. The time evolution of the TNE intensity provides a convenient and efficient physical criterion to discriminate the stages of the spinodal decomposition and domain growth. Via the DBM simulation and this criterion, we quantitatively study the effects of latent heat and surface tension on phase separation. It is found that the TNE strength attains its maximum at the end of the spinodal decomposition stage, and it decreases when the latent heat increases from zero. The surface tension effects are threefold, prolong the duration of the spinodal decomposition stage, decrease the maximum TNE intensity, and accelerate the speed of the domain growth stage.
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary ;  Physics, Multidisciplinary ;  Polymer Science
关键词[WOS]: EQUATION-OF-STATE ;  LATTICE-BOLTZMANN ;  PHASE-SEPARATION ;  COMPRESSIBLE FLOWS ;  NONIDEAL FLUIDS ;  BINARY FLUIDS ;  SIMULATION ;  COALESCENCE ;  MIXTURES ;  SURFACES
收录类别: SCI
项目资助者: Science Foundation of National Key Laboratory of Computational Physics ;  State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences [Y4KF151CJ1] ;  National Natural Science Foundation of China [11475028, 11202003, 11203001] ;  Science Foundation of Hebei Province [A2013409003, YQ2013013, ZD2014089]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21127
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Gan, YB,Xu, AG,Zhang, GC,et al. Discrete Boltzmann modeling of multiphase flows: hydrodynamic and thermodynamic non-equilibrium effects[J]. SOFT MATTER,2015,11(26):5336-5345.
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