Search found 280 matches

by Luciano Garelli
Thu Mar 23, 2017 9:22 pm
Forum: code_saturne usage
Topic: Equation convergence tolerance in Code Saturne
Replies: 1
Views: 2813

Re: Equation convergence tolerance in Code Saturne

Hello, I really don't know in detail where the convergence it is verified but you can check the the file /base/cs_equation_iterative_solve.c and the documentation in http://code-saturne.org/doxygen/src/cs__equation__iterative__solve_8c.html . Also, in the theory guide there are information about res...
by Luciano Garelli
Thu Mar 23, 2017 8:51 pm
Forum: code_saturne usage
Topic: Thermal conductivity/diffusivity in C
Replies: 3
Views: 2882

Re: Thermal conductivity/diffusivity in C

Hello, You can check it in the user manual (search for kivisl, diffusivity or conductivity) Also check the cs_user_parameters.f90 file in the SRC/EXAMPLE directory in order to view how to access. Regards, Luciano EDIT: Sorry..you ask for the C function and I have wrote about the fortran subroutine
by Luciano Garelli
Fri Mar 10, 2017 11:43 pm
Forum: code_saturne usage
Topic: Quick question about Paraview
Replies: 2
Views: 1958

Re: Quick question about Paraview

Hello,

I think that you want to scale the geometry in the "z" direction. You can use the filter "Transform" for that.
http://www.paraview.org/Wiki/ParaView/U ... #Transform

Regards

Luciano
by Luciano Garelli
Tue Feb 21, 2017 4:48 pm
Forum: code_saturne usage
Topic: reduce number of cells being flagged as offset
Replies: 5
Views: 3317

Re: reduce number of cells being flagged as offset

Hello, I was checking the source code (cs_mesh_bad_cells.c) of the offset criterion in CS 4.0.0 and CS 4.0.6. This criteria has changed from CS 4.0.0 of_n = fabs(_DOT_PRODUCT_3D(v_of, v_n)); to CS 4.0.6 of_n = _MODULE_3D(v_of) * _MODULE_3D(v_n); Also, you can view the change in the formula in the CS...
by Luciano Garelli
Tue Feb 21, 2017 3:27 pm
Forum: code_saturne usage
Topic: reduce number of cells being flagged as offset
Replies: 5
Views: 3317

Re: reduce number of cells being flagged as offset

Hello, I run your script and did the check mesh in CS 4.0.2 and get 0% of bad cells with the offset criterion and 2% (21000 cells) of bad cells with Least-Squares Gradient criterion over 1.33 Mcells. But, if you change Netgen 3D by 3D Extrusion in the solid meshes you will get a mesh of 650 Kcell wi...
by Luciano Garelli
Mon Feb 20, 2017 3:33 pm
Forum: code_saturne usage
Topic: reduce number of cells being flagged as offset
Replies: 5
Views: 3317

Re: reduce number of cells being flagged as offset

Hello, In the theory guide of CS you can find de definition of the Cell Offset quality criteria and the geometrical parameters involved. http://code-saturne.org/cms/sites/default/files/docs/4.3/theory.pdf Are you sure that your internal mesh is fully tetrahedral? Because it appears to be an 3D extru...
by Luciano Garelli
Tue Feb 07, 2017 3:23 pm
Forum: code_saturne usage
Topic: Error in radiation heat transfer
Replies: 6
Views: 3661

Re: Error in radiation heat transfer

Hello,

Reading the listing file, I have seen that you have a warning at the Free Inlet/Outlet:

Warning : free inlet outlet boundary conditions without external head loss definition

and I think that the error (may be) comes from the walls BC's. Did you try with smooth wall?

Regards,

Luciano
by Luciano Garelli
Tue Feb 07, 2017 1:30 pm
Forum: code_saturne usage
Topic: Error in radiation heat transfer
Replies: 6
Views: 3661

Re: Error in radiation heat transfer

Hello Jundi He, Please check the value of the head loss (K) in the "Free inlet/Oulet" boundary condition. By default (in my cases) this value is not setted and give me a similar error. But if you say that the error appears only when you activate the radiation module I do not think this is ...
by Luciano Garelli
Mon Feb 06, 2017 9:30 pm
Forum: Syrthes related questions
Topic: syrthes - transfer of mesh and result files
Replies: 5
Views: 7497

Re: syrthes - transfer of mesh and result files

Hello kathi, The tool to convert a mesh created in salome (* .med) to a mesh to be used in Syrthes is "convert2syrthes4", and it is provided as a Syrthes tool. For the results file, inside of syrthes you have to go to "Running options" , "Advanced Options" , "Conve...
by Luciano Garelli
Fri Feb 03, 2017 4:24 pm
Forum: Syrthes related questions
Topic: About the result file of Syrthes
Replies: 10
Views: 10322

Re: About the result file of Syrthes

Hello, Yes, using Salome you can export a mesh surface as a *.DAT file, in the first line you get the number of nodes and the number of element, then the list of nodes (global node ID , coordinates) and then the list of elements (global element ID, conectivities). Also, you can do it using Paravis a...