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Reply To: As to LBM-LES with SGS and Wall function compared with LES of NS

OpenLB – Open Source Lattice Boltzmann Code › Forums › on Lattice Boltzmann Methods › General Topics › As to LBM-LES with SGS and Wall function compared with LES of NS › Reply To: As to LBM-LES with SGS and Wall function compared with LES of NS

December 7, 2023 at 3:37 pm #7997
stephan
Moderator

Dear Yuji,

thank you for your comment, I’ll try to answer from my personal perspective.

Apparently, it is a good thing to use wall-modeled LES (WMLES) also in direct NS solvers.
The grid requirement for doing this is much less than wall-resolved LES (i.e. LES without wall model but fine enough grid near the wall), which is why WMLES is regarded as more promising for industrial application in the near future (cf. https://doi.org/10.1063/5.0036515).

In addition, using SGS only without a wall model and without sufficiently refined grid (wrt y+), can lead to very bad results near the wall in wall-bounded turbulence.
Unfortunately, I do not have a reference for this.

BR
Stephan

  • This reply was modified 7 months, 3 weeks ago by stephan.