A multi-relaxation lattice kinetic method for passive scalar diffusion

  • Authors:
  • Igor Rasin;Sauro Succi;Wolfram Miller

  • Affiliations:
  • Institute for Crystal Growth (IKZ), Max-Born-Str. 2, 12489 Berlin, Germany;Istituto Applicazioni Calcolo CNR, 137 Viale Policlinico, 00144 Rome, Italy;Institute for Crystal Growth (IKZ), Max-Born-Str. 2, 12489 Berlin, Germany

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2005

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Abstract

A kinetic Lattice-Boltzmann scheme for advection-diffusion is presented. The scheme is based on a matrix formulation of the lattice Boltzmann method which permits to handle non-isotropic diffusion-advection problems. In addition, by adjusting the kinetic eigenvectors defining the collision matrix to the local value of the flow velocity, the scheme is also shown to preserve isotropy under genuinely two-dimensional flow.