4.7 Article

Extended lattice Boltzmann model for gas dynamics

Journal

PHYSICS OF FLUIDS
Volume 33, Issue 4, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/5.0048029

Keywords

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Funding

  1. ETH [ETH-13 17-1]
  2. European Research Council (ERC) [834763-PonD]
  3. [s897]

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The two-population lattice Boltzmann model proposed in this study accurately simulates compressible flows, demonstrating good performance even in the presence of turbulence and shock waves.
We propose a two-population lattice Boltzmann model on standard lattices for the simulation of compressible flows. The model is fully on-lattice and uses the single relaxation time Bhatnagar-Gross-Krook kinetic equations along with appropriate correction terms to recover the Navier-Stokes-Fourier equations. The accuracy and performance of the model are analyzed through simulations of compressible benchmark cases including Sod shock tube, sound generation in shock-vortex interaction, and compressible decaying turbulence in a box with eddy shocklets. It is demonstrated that the present model provides an accurate representation of compressible flows, even in the presence of turbulence and shock waves.

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