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	Smoothed dissipative particle dynamics model for mesoscopic multiphase flows in the presence of thermal fluctuations
	Lei, Huan ; Baker, Nathan A. ; Wu, Lei ; Schenter, Gregory K. ; Mundy, Christopher J. ; Tartakovsky, Alexandre M.
	2016
关键词	SURFACE-TENSION STATISTICAL-MECHANICS HYDRODYNAMICS MODEL GENERAL FORMALISM COMPLEX FLUIDS LENGTH SCALES SIMULATION THERMODYNAMICS INTERFACES SPH
英文摘要	Thermal fluctuations cause perturbations of fluid-fluid interfaces and highly nonlinear hydrodynamics in multiphase flows. In this work, we develop a multiphase smoothed dissipative particle dynamics (SDPD) model. This model accounts for both bulk hydrodynamics and interfacial fluctuations. Interfacial surface tension is modeled by imposing a pairwise force between SDPD particles. We show that the relationship between the model parameters and surface tension, previously derived under the assumption of zero thermal fluctuation, is accurate for fluid systems at low temperature but overestimates the surface tension for intermediate and large thermal fluctuations. To analyze the effect of thermal fluctuations on surface tension, we construct a coarse-grained Euler lattice model based on the mean field theory and derive a semianalytical formula to directly relate the surface tension to model parameters for a wide range of temperatures and model resolutions. We demonstrate that the present method correctly models dynamic processes, such as bubble coalescence and capillary spectra across the interface.; U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research, Collaboratory on Mathematics for Mesoscopic Modeling of Materials (CM4); New Dimension Reduction Methods and Scalable Algorithms for Nonlinear Phenomena project; DOE Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences; DOE [DE-AC05-76RL01830]; SCI(E); EI; PubMed; ARTICLE; alexandre.tartakovsky@pnnl.gov; 2; 023304; 94
语种	英语
出处	EI ; PubMed ; SCI
出版者	PHYSICAL REVIEW E
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/491651]
专题	数学科学学院
推荐引用方式 GB/T 7714	Lei, Huan,Baker, Nathan A.,Wu, Lei,et al. Smoothed dissipative particle dynamics model for mesoscopic multiphase flows in the presence of thermal fluctuations. 2016-01-01.

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