Search found 280 matches

by Luciano Garelli
Mon May 22, 2017 11:35 am
Forum: code_saturne usage
Topic: 2D_AIRFOIL TESTCASE
Replies: 1
Views: 2000

Re: 2D_AIRFOIL TESTCASE

Hello, I think that you forget to specify the velocity direction at inlet BC, maybe this is the problem. Always search in the forum your keywords ("lift, drag, etc") in order to know if someone has ask the same question, I leave here a link http://code-saturne.org/forum/viewtopic.php?f=2&a...
by Luciano Garelli
Wed May 17, 2017 1:06 pm
Forum: code_saturne usage
Topic: Wall function
Replies: 2
Views: 2109

Re: Wall function

Hello,

In section 5.4 of the theory guide and in section 8.2.5 of the user guide (Ver 4.3) you have information about the wall functions and the turbulence models. I think that should change your turbulence model to K-omega or V2-f.

Regards

Luciano
by Luciano Garelli
Tue May 16, 2017 8:24 pm
Forum: code_saturne usage
Topic: Convergence
Replies: 21
Views: 10699

Re: Convergence

Hello, Yes, N_iter are number of iterations used to solve the linear system to the relative precision (epsilo). You have a section in the user guide (8.2.11) about error estimators for Navier-Stokes. If the derive has dropped several order of magnitudes this means that the flow is not changing and y...
by Luciano Garelli
Fri May 12, 2017 10:59 am
Forum: code_saturne usage
Topic: Convergence
Replies: 21
Views: 10699

Re: Convergence

Hello,

In the listing file you can check the mass flow conservation in the section "BOUNDARY MASS FLOW INFORMATION"; there you have for each boundary condition type the mass flow and I think with a value of 0.58E+12 your solution it is not converging...

Regards,

Luciano
by Luciano Garelli
Thu May 11, 2017 11:50 am
Forum: code_saturne usage
Topic: Convergence
Replies: 21
Views: 10699

Re: Convergence

Hello, Yes, if you want to read in Paravis you have to save in csv format and about how many points, this will depend of your physical problem, the domain, etc. You have to know where to locate them. The lines of code that I posted are not exclusive for CS so you don't have to implement anything, yo...
by Luciano Garelli
Wed May 10, 2017 8:37 pm
Forum: code_saturne usage
Topic: Convergence
Replies: 21
Views: 10699

Re: Convergence

Hello, As Yvan mention, you could use monitoring (probe) points inserted through the GUI (Calculation Control -> Output control -> monitoring points) in different spatial location in order to check the time/iteration evolution of your variables (pressure, velocity, etc), but not the derive indicator...
by Luciano Garelli
Thu May 04, 2017 10:07 am
Forum: code_saturne usage
Topic: k omega model converge problem
Replies: 8
Views: 6140

Re: k omega model converge problem

Hello, I was reading your last listing file and note the following things. Issue has been detected during the mesh quality check, also you have a message that all your cells have a mass source term, it is correct? At the outlet you are using a free inlet/outlet BC without a external head loss defini...
by Luciano Garelli
Tue May 02, 2017 8:40 am
Forum: code_saturne usage
Topic: k omega model converge problem
Replies: 8
Views: 6140

Re: k omega model converge problem

Hello, You can find information about the turbulence model and wall functions in both, the theory and users guide of CS. Also, you can check the files(cs_wall_functions.c and cs_wall_functions.h) about the implementation of this laws. Additionally, you are solving a heat transfer problem so you need...
by Luciano Garelli
Tue Apr 11, 2017 11:07 am
Forum: code_saturne usage
Topic: How to couple two fluid domain
Replies: 5
Views: 3119

Re: How to couple two fluid domain

Hello,

May be this old post could help you http://code-saturne.org/forum/viewtopic.php?f=2&t=67.

I think that you should try first to couple the two fluid domains and then these with syrthes,

Regards

Luciano
by Luciano Garelli
Mon Apr 10, 2017 6:43 pm
Forum: code_saturne usage
Topic: How to couple two fluid domain
Replies: 5
Views: 3119

Re: How to couple two fluid domain

Hello,

What data/information do you need to exchange through the interfaces solid-fluid and fluid-fluid?

Regards

Luciano