OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › LBM turbulence › Reply To: LBM turbulence February 20, 2023 at 4:06 pm #7211 FBukreevKeymaster Hello, I think you have not defined the Smagorinsky Constant there sLattice.setParameter<collision::LES::Smagorinsky>(T(0.15)); Greetings Fedor