Filtered density function simulator on unstructured meshes

  • Authors:

  • N. Ansari;G. M. Goldin;M. R. H. Sheikhi;P. Givi

  • Affiliations:

  • Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA and ANSYS Inc., 275 Technology Dr., Canonsburg, PA 15317, USA;ANSYS Inc., 275 Technology Dr., Canonsburg, PA 15317, USA;Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA;Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2011

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Abstract

A new computational filtered density function (FDF) methodology is developed for large eddy simulation (LES) of turbulent reacting flows. This methodology is based on a Lagrangian Monte Carlo (MC) FDF solver constructed on a domain portrayed by an unstructured mesh. The base filtered transport equations on this mesh are solved by a finite-volume (FV) method. The consistency of the hybrid FV-MC solver and the realizability of the simulated results are demonstrated via LES of a temporally developing mixing layer. The overall performance of the model is appraised by comparison with direct numerical simulation (DNS) data. The algorithmic implementation in the commercial software ANSYS-FLUENT facilitates future FDF-LES of turbulent combustion in complex configurations.