What does ViscoBoundFactor do in SPS-LES?
I am running a DualSPHysics simulation and in the Run.out file I see:
Viscosity="Laminar+SPS" Visco=0.000001 ViscoBoundFactor=0.000000
I have purposedly set the value to 0, but what would happen if I change it? I cannot see where it enters in SPS-LES.
I see that for artificial viscosity (based on previous discussion; https://forums.dual.sphysics.org/discussion/comment/3830#Comment_3830) it is:
AlphaBF = ViscoBoundFactor * alphaFF
But AlphaBF is not defined in SPS-LES method?
I see that at the time I did a lid-driven cavity flow test:
Could anyone kindly explain why this needs to be specified in the SPS-LES model and why this interaction is not automatically taken care of using LES modelling? Is it because that in reality no wall-function is used and then ViscoBoundFactor enables one in SPS-LES?