Discrete Boltzmann modeling of multiphase flows: hydrodynamic and   thermodynamic non-equilibrium effects

doi:10.1039/c5sm01125f

CORC > 北京大学 > 工学院

	Discrete Boltzmann modeling of multiphase flows: hydrodynamic and thermodynamic non-equilibrium effects
	Gan, Yanbiao ; Xu, Aiguo ; Zhang, Guangcai ; Succi, Sauro
刊名	SOFT MATTER
	2015
关键词	EQUATION-OF-STATE LATTICE-BOLTZMANN PHASE-SEPARATION COMPRESSIBLE FLOWS NONIDEAL FLUIDS BINARY FLUIDS SIMULATION COALESCENCE MIXTURES SURFACES
DOI	10.1039/c5sm01125f
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.; 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]; SCI(E); EI; ARTICLE; Xu_Aiguo@iapcm.ac.cn; 26; 5336-5345; 11
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/421177]
专题	工学院
推荐引用方式 GB/T 7714	Gan, Yanbiao,Xu, Aiguo,Zhang, Guangcai,et al. Discrete Boltzmann modeling of multiphase flows: hydrodynamic and thermodynamic non-equilibrium effects[J]. SOFT MATTER,2015.
APA	Gan, Yanbiao,Xu, Aiguo,Zhang, Guangcai,&Succi, Sauro.(2015).Discrete Boltzmann modeling of multiphase flows: hydrodynamic and thermodynamic non-equilibrium effects.SOFT MATTER.
MLA	Gan, Yanbiao,et al."Discrete Boltzmann modeling of multiphase flows: hydrodynamic and thermodynamic non-equilibrium effects".SOFT MATTER (2015).