Search found 48 matches

by C0st4s
Sun Jun 16, 2019 7:26 pm
Forum: Installation issues
Topic: Installation_configuration_errors
Replies: 6
Views: 4555

Installation_configuration_errors

Hi, Hope you are well. I am using Code_Saturnev5.0.8 in Ubuntu 16.04 on a desktop machine and works fine. Now, I tried to install the same version in Ubuntu 18.04 in a laptop machine though I run into some errors while configuring the code , any ideas? Please find attached the config log. I used Sal...
by C0st4s
Tue Jun 11, 2019 7:08 pm
Forum: code_saturne usage
Topic: Wall_shear_stress_from_post_util
Replies: 4
Views: 3119

Re: Wall_shear_stress_from_post_util

Dear Yvan, Thank you for your reply. I thought of finding a way to call directly the friction velocities from clptur.f90 i.e rho uk*uk and compute the wall shear stress. I supposed this is from where the code compute the efforts. Though, is it possible to make a call for the variable uk in that rout...
by C0st4s
Fri Jun 07, 2019 6:14 pm
Forum: code_saturne usage
Topic: Wall_shear_stress_from_post_util
Replies: 4
Views: 3119

Re: Wall_shear_stress_from_post_util

Dear Luciano,

Thanks for you reply. I will check it though I do not know how valid is that approach if you use standard k-epsilon.


Regards,
Costas
by C0st4s
Fri May 31, 2019 7:15 pm
Forum: code_saturne usage
Topic: Wall_shear_stress_from_post_util
Replies: 4
Views: 3119

Wall_shear_stress_from_post_util

Hi, Hope you are well. I would like to ask you how can I perform a time average of the wall shear stress on the vertical wall of a square cavity i.e from the tutorial examples. I know the tangential stress can be called from post_util.f90 and pass the information in the cs_user_extra_operations.f90 ...
by C0st4s
Thu Apr 25, 2019 10:55 am
Forum: code_saturne usage
Topic: Low value of Turbulent heat fluxes in Natural convection
Replies: 9
Views: 5061

Re: Low value of Turbulent heat fluxes in Natural convection

Hi,

Thanks for the clarification. Another question if you do not mind. If you use Boussinesq through cs_user_source_terms.f90 under ustsnv what did you do with the gravity vector in the generation rate of turbulence (Gk)?

Cheers,
Costas
by C0st4s
Mon Apr 08, 2019 9:44 pm
Forum: code_saturne usage
Topic: Umist_wall_function
Replies: 8
Views: 5337

Re: Umist_wall_function

Dear Jean-Francois Wald, Thank you for your reply. Another question that I have is what is the value imposed regarding the dissipation rate of the near wall node? As far as I understood, a neumann boundary condition is imposed for the dissipation rate of the flux concerning the face node, . Best reg...
by C0st4s
Mon Apr 08, 2019 9:43 pm
Forum: code_saturne usage
Topic: Low value of Turbulent heat fluxes in Natural convection
Replies: 9
Views: 5061

Re: Low value of Turbulent heat fluxes in Natural convection

Hi,

May I asked how did you implement Boussinessq?

i.e cs_user_source_terms.f90 under ustsnv or cs_user_physical_properties.f90 under usphyv?


Cheers,
Costas
by C0st4s
Tue Nov 27, 2018 1:45 pm
Forum: code_saturne usage
Topic: Umist_wall_function
Replies: 8
Views: 5337

Re: Umist_wall_function

Hi, I have read the clptur.f90 but I need some explanations. Firstly, I was looking at the formulation of the standard wall from the literature function Pk_on_cell.png and the one implemented in Code Saturne. My question is where are the Pk and average epsilon terms go in the code if the are the sam...
by C0st4s
Sun Nov 25, 2018 12:11 am
Forum: code_saturne usage
Topic: Umist_wall_function
Replies: 8
Views: 5337

Re: Umist_wall_function

That would be great!thanks.
Meanwhile something that will help me is if you can explain what does rcprod in the velocity boundary conditions and pimp in the k-epsilon boundary in the clptur.f90.
by C0st4s
Fri Nov 23, 2018 8:42 pm
Forum: code_saturne usage
Topic: Umist_wall_function
Replies: 8
Views: 5337

Re: Umist_wall_function

Dear Yvan,

I have figured out that what is needed is to modify the boundaries in clptur.90, cs_wall_functions.c/h. Though I was wondering if need to modify also the subroutines of the model turbke.f90 like the production terms. Any ideas?


Thanks