FIG 2 - uploaded by Xiao Xue
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Overview of how to couple the RANS with the LES-LBM framework. The left panel is the RANS computational domain. The colored layer is the velocity field at the RANS/LES-LBM interface. The middle part is the interpolated velocity field obtained from the RANS data. The right panel shows the sketch of the LES-LBM computational domain. The inlet velocity field (colored light green) is reconstructed from the interpolated RANS mean profile with superimposed synthetic fluctuations.
Source publication
The paper presents a synthetic turbulence generator (STG) for the lattice Boltzmann method (LBM) at the interface of the Reynolds averaged Naiver-Stokes (RANS) equations and the LBM Large Eddy Simulation (LES). We first obtain the RANS velocity field from a finite volume solver at the interface. Then, we apply a numerical interpolation from the RAN...
Context in source publication
Context 1
... Eq. (22)-Eq. (27), we use the regularized lattice Boltzmann method to reconstruct the particle distribution function f i (x, t) at the inlet boundary with correct velocity and density quantities. Finally, we apply the streaming and collision step to updating the fluid field. Fig. 2 shows the general process of integrating the STG method at the RANS/LES-LBM ...
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The paper presents a synthetic turbulence generator (STG) for the lattice Boltzmann method (LBM) at the interface of the Reynolds averaged Navier–Stokes (RANS) equations and the LBM large eddy simulation (LES). We first obtain the RANS velocity field from a finite volume solver at the interface. Then, we apply a numerical interpolation from the RAN...
