|June 8, 2009, 08:24||
Perturbations in LES solvers
Leonardo Giampani Morita
Join Date: Apr 2009
Location: Paris, France
Posts: 58Rep Power: 8
I'm simulating a jet in cross-flow with oodles and after some very preliminary results I found it strange that the velocity profile very close to the jet inlet was quite perturbed (turbulent), even if my inlet BC is uniform (fixedValue).
I mapped RANS results as initial conditions, but isn't it strange that this kind of perturbations appears in the very beginning of the tube?
I've verified the initial mapped fields and I found no perturbation, i.e., the profile at the same position mentioned above is totally uniform.
Do you know if the LES solvers generate perturbations in the flow by default?
By the way, do you think the turbulentInlet BC might be useful in my case (with no cyclic patches)? I ask this because I've read some posts where people say this is not enough to generate "permanent" turbulent structures, as they are dissipated very briefly, but usually people refer to a periodic system...
|Thread||Thread Starter||Forum||Replies||Last Post|
|LES and combustion model||Margherita Cadorin||CFX||0||October 29, 2008 06:24|
|Transient statistics for LES simulation||jonathan||CFX||0||March 5, 2008 16:24|
|Differences between a laminar code and a les one||ben||Main CFD Forum||9||February 17, 2005 00:40|
|LES on two phase flow||Li Yang||Main CFD Forum||0||May 12, 2004 08:10|
|Some Questions about LES.||Bin Li||Main CFD Forum||2||February 20, 2004 10:58|