Stochastic Hard-Sphere Dynamics for Hydrodynamics of Non-Ideal Fluids

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Description

A novel stochastic fluid model is proposed with a nonideal structure factor consistent with compressibility, and adjustable transport coefficients. This stochastic hard-sphere dynamics (SHSD) algorithm is a modification of the direct simulation Monte Carlo algorithm and has several computational advantages over event-driven hard-sphere molecular dynamics. Surprisingly, SHSD results in an equation of state and a pair correlation function identical to that of a deterministic Hamiltonian system of penetrable spheres interacting with linear core pair potentials. The fluctuating hydrodynamic behavior of the SHSD fluid is verified for the Brownian motion of a nanoparticle suspended in a compressible solvent.

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6 p. (0.3 MB)

Creation Information

Donev, A; Alder, B J & Garcia, A L February 26, 2008.

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Description

A novel stochastic fluid model is proposed with a nonideal structure factor consistent with compressibility, and adjustable transport coefficients. This stochastic hard-sphere dynamics (SHSD) algorithm is a modification of the direct simulation Monte Carlo algorithm and has several computational advantages over event-driven hard-sphere molecular dynamics. Surprisingly, SHSD results in an equation of state and a pair correlation function identical to that of a deterministic Hamiltonian system of penetrable spheres interacting with linear core pair potentials. The fluctuating hydrodynamic behavior of the SHSD fluid is verified for the Brownian motion of a nanoparticle suspended in a compressible solvent.

Physical Description

6 p. (0.3 MB)

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PDF-file: 6 pages; size: 0.3 Mbytes

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  • Journal Name: Physical Review Letters, vol. 101, no. 2008, January 8, 2008, pp. 075902; Journal Volume: 101; Journal Issue: 7

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  • Report No.: LLNL-JRNL-401745
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 944371
  • Archival Resource Key: ark:/67531/metadc900182

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  • February 26, 2008

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • April 13, 2017, 6:23 p.m.

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Donev, A; Alder, B J & Garcia, A L. Stochastic Hard-Sphere Dynamics for Hydrodynamics of Non-Ideal Fluids, article, February 26, 2008; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc900182/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.