Hello,
I will have a look at your test case.
If I understand well it works for k-eps without layers but does not work for k-w SST with layers.
First, could you tell me if it works with k-w SST without layers ?
Regards,
Jean-Francois
Search found 9 matches
- Tue Jan 07, 2020 10:35 am
- Forum: code_saturne usage
- Topic: Divergence in k-omega cases with inflation layers
- Replies: 10
- Views: 5700
- Tue Apr 09, 2019 12:54 pm
- Forum: code_saturne usage
- Topic: Low value of Turbulent heat fluxes in Natural convection
- Replies: 9
- Views: 5114
Re: Low value of Turbulent heat fluxes in Natural convection
Hello Everyone, I am running Rayleigh Benard natural convection case with Rayleigh number to be 630000 and Pr as 0.71. I am using AFM as turbulent heat flux model. For boussinesq implementation, I am adding boussiesq(rho*beta*(T-t_ref)*g) source term in momentum equation. I am facing an unusual pro...
- Tue Nov 27, 2018 2:33 pm
- Forum: code_saturne usage
- Topic: Umist_wall_function
- Replies: 8
- Views: 5378
Re: Umist_wall_function
Those 2 layers "standard" wall functions are not the one implemented in the code. Again, please have a look at the Theory guide that you can access via the command line I gave you before or here . This will give you an overview of what is implemented in clptur.f90 and cs_wallfunctions.c/.h...
- Tue Nov 27, 2018 12:21 pm
- Forum: code_saturne usage
- Topic: Umist_wall_function
- Replies: 8
- Views: 5378
Re: Umist_wall_function
Hello ! I strongly advise to read the clptur section in the theory guide (code_saturne info -g theory) you will have some better insight in how wall functions are computed. All boundary conditions are imposed through the clptur routine. Whether you have to modify or not the production in the turbke ...
- Thu Sep 20, 2018 6:30 pm
- Forum: code_saturne usage
- Topic: Problem using k-omega SST model to simulate flow around a circular cylinder
- Replies: 4
- Views: 4049
Re: Problem using k-omega SST model to simulate flow around a circular cylinder
Hello Lei, Thanks a lot for sharing your test case. You are right concerning the Neumann type BC for Omega in the code. We are currently working on an similar issue. Could you try to set the Neumann constant of Omega BC to 6.75 instead of 120 and see if this improve your results ? Could you also ple...
- Tue May 22, 2018 3:15 pm
- Forum: code_saturne usage
- Topic: Temperature field with the RSM-EB model
- Replies: 4
- Views: 3688
Re: Temperature field with the RSM-EB model
Dear Andrea, I think the behavior you get is typical of the use of EBRSM turbulence model combined with SGDH for temperature. The latter is intrinsically wrong when used with low Reynolds RSM models. In this case nu_t is computed through its k-eps expression C_mu k^2/epsilon, but this expression is ...
- Thu May 03, 2018 8:15 am
- Forum: Discussion
- Topic: wall function implementation, k-epsilon
- Replies: 6
- Views: 7079
Re: wall function implementation, k-epsilon
Fluid properties such as dynamic viscosity are already passed as argument to the wallfunctions subroutine and are thus accessible in the "cs_wall_functions.h". I assume you're trying to implement wall functions similar to the UMIST analytical wall functions from Craft et al. (2002) which r...
- Mon Apr 30, 2018 1:42 pm
- Forum: Discussion
- Topic: wall function implementation, k-epsilon
- Replies: 6
- Views: 7079
Re: wall function implementation, k-epsilon
Dear Ionut, I'm not familiar with the Windows versions of Code_Saturne. When dealing with code modification going beyond modification of user subroutine, installing the code through sources (under Linux) and then re-compile/re-build the sources with those advanced modifications is usually preferred....
- Fri Apr 27, 2018 3:18 pm
- Forum: Discussion
- Topic: wall function implementation, k-epsilon
- Replies: 6
- Views: 7079
Re: wall function implementation, k-epsilon
Dear Ionut There are currently no dedicated user files that enables the user to prescribe user defined wall functions. It is however possible to modify a wall function or even to add one through sources. Wall boundary conditions are set in the clptur.f90 file that you 'll find in the src/base direct...