Heat Flux in a Vibrated Granular Gas: The Diffusive Heat Conductivity Coefficient

Abstract

The transport coefficient coupling heat flux and density gradient in a granular gas is measured by taking advantage of the existence of a minimum in the temperature profile of an open vibrated granular medium. This temperature inversion is closely related to the existence of the new transport coefficient. Particle simulations using the Direct Simulation Monte Carlo method will be used to compute the transport coefficient, and the results will be compared with theoretical predictions derived from the Boltzmann equation. Finally, the accuracy of a boundary condition requiring the hydrodynamic heat flux to vanish for infinite heights will be discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jul 13, 2005
Accession Number
ADA446069

Entities

People

  • J. J. Brey
  • M. J. Ruiz-montero

Organizations

  • University of Seville

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boltzmann Equation
  • Boundaries
  • Coefficients
  • Computational Science
  • Computer Simulations
  • Conductivity
  • Equations
  • Granular Materials
  • Heat Flux
  • Hydrodynamics
  • Monte Carlo Method
  • Navier Stokes Equations
  • Simulations
  • Steady State
  • Temperature Gradients
  • Thermal Conductivity
  • Three Dimensional

Readers

  • Combustion science or combustion engineering.
  • Computational Fluid Dynamics (CFD)
  • Plasma Physics / Magnetohydrodynamics