DSMC Evaluation of the Navier-Stokes Shear Viscosity of a Granular Fluid

Abstract

A method based on the simple shear flow modified by the introduction of a deterministic non-conservative force and a stochastic process is proposed to measure the Navier Stokes shear viscosity in a granular fluid described by the Enskog equation. The method is implemented in DSMC simulations for a wide range of values of dissipation and density. It is observed that, after a certain transient period, the system reaches a hydrodynamic stage which tends to the Navier Stokes regime for long times. The results are compared with theoretical predictions obtained from the Chapman Enskog method in the leading Sonine approximation, showing quite a good agreement, even for strong dissipation.

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Document Details

Document Type
Technical Report
Publication Date
Jul 13, 2005
Accession Number
ADA447328

Entities

People

  • Andres Santos
  • Jose M. Montanero
  • Vicente Garzo

Organizations

  • University of Extremadura

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Agreements
  • Coefficients
  • Dissipation
  • Distribution Functions
  • Equations
  • Flow
  • Fluids
  • Gas Dynamics
  • Gases
  • Integral Equations
  • Knudsen Number
  • Low Density
  • Mechanical Properties
  • Shear Flow
  • Steady State
  • Stochastic Processes
  • Viscosity

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.