Comparison between Lattice Boltzmann Simulation and Detached-Eddy Simulation on the Cavity Problem

  • Cédric Larricq
  • Xiao-Yu Yang
  • Hui-Liu Zhang
  • Da-Kai Lin
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 117)


The M219 cavity benchmark problem is used to compare the performance and the applicability of two commercial software, namely Ansys Fluent and Exa Powerflow. The computational domain is small and is concentrated around the cavity to limit the computation time and thus permit to assess the possibility of carrying out such simulations in an industrial context. Despite the small length of the domain, far-field conditions are imposed at the open boundaries which induces some unphysical pressure wave reflections. On the reference cavity case (Ma=0.85, P=62900), the second and third tones are well captured but the background noise and sound pressure level are higher than previously mentioned in the literature. Wave reflection and boundary layer features are thought to be the main causes of these discrepancies. A case at Mach number equal to 0.30 was carried out; Fluent and Powerflow present similar results in terms of acoustics characteristics. The mean flow computation shows slight differences which are certainly due to different boundary layers attacking the cavity leading edge.


Mach Number Sound Pressure Level Streamwise Velocity Lattice Boltzmann Method Power Spectrum Density 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Cédric Larricq
    • 1
  • Xiao-Yu Yang
    • 1
  • Hui-Liu Zhang
    • 1
  • Da-Kai Lin
    • 1
  1. 1.Research InstituteCOMAC – Beijing Aeronautical Science & TechnologyBeijingChina

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