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Implicit atomistic viscosities in smoothed dissipative particle dynamics.
Phys Rev E 2019; 100(3-1):033318PR

Abstract

We apply a standard nonequilibrium dynamics microscopic analysis of transport coefficients to the smoothed dissipative particle dynamics (SDPD) method of steady-shear flow conditions. Extending the research of Ellero et al. [Phys. Rev. E 82, 046702 (2010)PRESCM1539-375510.1103/PhysRevE.82.046702] for smoothed particle hydrodynamics (SPH), we focus, in particular, on velocity and acceleration statistics and on mean-density phenomena. Implicit and explicit fluctuations affect non-Gaussian statistics and effective viscosities whereas only explicit fluctuations affect large-scale dissipation through the fluctuation-dissipation relation. SDPD facilitates the simulation of mesoscopic systems as the resolution scale is defined by the scaling of the random fluctuations. In the kinetic regime, SDPD recovers the behavior of SPH. In the diffusive regime, non-Gaussian behavior occurs, in contrast to SPH. We observe the formation of isotropic randomly oriented structures with high density which are related to the magnitude of thermal fluctuations. It is demonstrated that SDPD produces non-Gaussian acceleration PDF corresponding to that of a turbulent flow field.

Authors+Show Affiliations

Chair of Aerodynamics and Fluid Mechanics, Department of Mechanical Engineering, Technical University of Munich, 85748 Munich, Germany.Chair of Aerodynamics and Fluid Mechanics, Department of Mechanical Engineering, Technical University of Munich, 85748 Munich, Germany.Chair of Aerodynamics and Fluid Mechanics, Department of Mechanical Engineering, Technical University of Munich, 85748 Munich, Germany.Chair of Aerodynamics and Fluid Mechanics, Department of Mechanical Engineering, Technical University of Munich, 85748 Munich, Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31640035

Citation

Borreguero, Morgane, et al. "Implicit Atomistic Viscosities in Smoothed Dissipative Particle Dynamics." Physical Review. E, vol. 100, no. 3-1, 2019, p. 033318.
Borreguero M, Bezgin D, Adami S, et al. Implicit atomistic viscosities in smoothed dissipative particle dynamics. Phys Rev E. 2019;100(3-1):033318.
Borreguero, M., Bezgin, D., Adami, S., & Adams, N. A. (2019). Implicit atomistic viscosities in smoothed dissipative particle dynamics. Physical Review. E, 100(3-1), p. 033318. doi:10.1103/PhysRevE.100.033318.
Borreguero M, et al. Implicit Atomistic Viscosities in Smoothed Dissipative Particle Dynamics. Phys Rev E. 2019;100(3-1):033318. PubMed PMID: 31640035.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Implicit atomistic viscosities in smoothed dissipative particle dynamics. AU - Borreguero,Morgane, AU - Bezgin,Deniz, AU - Adami,Stefan, AU - Adams,Nikolaus A, PY - 2019/02/21/received PY - 2019/10/24/entrez PY - 2019/10/24/pubmed PY - 2019/10/24/medline SP - 033318 EP - 033318 JF - Physical review. E JO - Phys Rev E VL - 100 IS - 3-1 N2 - We apply a standard nonequilibrium dynamics microscopic analysis of transport coefficients to the smoothed dissipative particle dynamics (SDPD) method of steady-shear flow conditions. Extending the research of Ellero et al. [Phys. Rev. E 82, 046702 (2010)PRESCM1539-375510.1103/PhysRevE.82.046702] for smoothed particle hydrodynamics (SPH), we focus, in particular, on velocity and acceleration statistics and on mean-density phenomena. Implicit and explicit fluctuations affect non-Gaussian statistics and effective viscosities whereas only explicit fluctuations affect large-scale dissipation through the fluctuation-dissipation relation. SDPD facilitates the simulation of mesoscopic systems as the resolution scale is defined by the scaling of the random fluctuations. In the kinetic regime, SDPD recovers the behavior of SPH. In the diffusive regime, non-Gaussian behavior occurs, in contrast to SPH. We observe the formation of isotropic randomly oriented structures with high density which are related to the magnitude of thermal fluctuations. It is demonstrated that SDPD produces non-Gaussian acceleration PDF corresponding to that of a turbulent flow field. SN - 2470-0053 UR - https://www.unboundmedicine.com/medline/citation/31640035/Implicit_atomistic_viscosities_in_smoothed_dissipative_particle_dynamics_ DB - PRIME DP - Unbound Medicine ER -
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