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Smoothed dissipative particle dynamics model for mesoscopic multiphase flows in the presence of thermal fluctuations.
Phys Rev E. 2016 Aug; 94(2-1):023304.PR

Abstract

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.

Authors+Show Affiliations

Pacific Northwest National Laboratory, Richland, Washington 99354, USA.Pacific Northwest National Laboratory, Richland, Washington 99354, USA.LMAM and School of Mathematical Sciences, Peking University, Beijing 100871, China.Pacific Northwest National Laboratory, Richland, Washington 99354, USA.Pacific Northwest National Laboratory, Richland, Washington 99354, USA.Pacific Northwest National Laboratory, Richland, Washington 99354, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27627409

Citation

Lei, Huan, et al. "Smoothed Dissipative Particle Dynamics Model for Mesoscopic Multiphase Flows in the Presence of Thermal Fluctuations." Physical Review. E, vol. 94, no. 2-1, 2016, p. 023304.
Lei H, Baker NA, Wu L, et al. Smoothed dissipative particle dynamics model for mesoscopic multiphase flows in the presence of thermal fluctuations. Phys Rev E. 2016;94(2-1):023304.
Lei, H., Baker, N. A., Wu, L., Schenter, G. K., Mundy, C. J., & Tartakovsky, A. M. (2016). Smoothed dissipative particle dynamics model for mesoscopic multiphase flows in the presence of thermal fluctuations. Physical Review. E, 94(2-1), 023304. https://doi.org/10.1103/PhysRevE.94.023304
Lei H, et al. Smoothed Dissipative Particle Dynamics Model for Mesoscopic Multiphase Flows in the Presence of Thermal Fluctuations. Phys Rev E. 2016;94(2-1):023304. PubMed PMID: 27627409.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Smoothed dissipative particle dynamics model for mesoscopic multiphase flows in the presence of thermal fluctuations. AU - Lei,Huan, AU - Baker,Nathan A, AU - Wu,Lei, AU - Schenter,Gregory K, AU - Mundy,Christopher J, AU - Tartakovsky,Alexandre M, Y1 - 2016/08/05/ PY - 2016/02/25/received PY - 2016/9/15/entrez PY - 2016/9/15/pubmed PY - 2016/9/15/medline SP - 023304 EP - 023304 JF - Physical review. E JO - Phys Rev E VL - 94 IS - 2-1 N2 - 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. SN - 2470-0053 UR - https://www.unboundmedicine.com/medline/citation/27627409/Smoothed_dissipative_particle_dynamics_model_for_mesoscopic_multiphase_flows_in_the_presence_of_thermal_fluctuations_ DB - PRIME DP - Unbound Medicine ER -
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