Search found 18 matches
- Fri Apr 28, 2023 1:53 pm
- Forum: code_saturne usage
- Topic: User law - "int" symbol
- Replies: 1
- Views: 1071
User law - "int" symbol
I was trying to use the "int" symbol as a floor function (as mentioned in the used guide). I tried to use the function like, for example, "x=int(1.5)" to return "x=1" but I got the following message from the Expression Editor: In function ‘cs_meg_boundary_function’: exp...
- Wed Jan 11, 2023 5:32 pm
- Forum: code_saturne usage
- Topic: Divergence with free inlet/outlet boundary conditions
- Replies: 4
- Views: 4744
Re: Divergence with free inlet/outlet boundary conditions
Hello, I found this post and it contains an issue similar to the one I'm currently facing: when I set a free inlet/outlet boundary condition the simulation diverges. I've a sort of jet pump (see example picture), with a water inlet (1), a water outlet (4) and a suction (2). If I set the suction (2) ...
- Mon Oct 03, 2022 11:01 am
- Forum: code_saturne usage
- Topic: Venturi pipe flow VOF convergence issue
- Replies: 6
- Views: 9994
Re: Venturi pipe flow VOF convergence issue
Hello Luciano and Yvan, @ Luciano: thank you for the update. I set the upwind scheme for velocity only and the simulation was running without interruptions. My question is: did you use that Scheme in your simulations or it is just a workaround for me? Minor question: why you prefer saving results in...
- Thu Sep 29, 2022 1:11 am
- Forum: code_saturne usage
- Topic: Venturi pipe flow VOF convergence issue
- Replies: 6
- Views: 9994
Re: Venturi pipe flow VOF convergence issue
Hello Luciano, thank you very much for your advice, now the simulation runs. I've some questions: 1) if I run the simulation with the Time Step Option = "Constant" (and reference time step = 0.0002 as suggested) the simulation stacks because of an excess of fluid speed. Did you face the sa...
- Wed Sep 21, 2022 5:33 pm
- Forum: code_saturne usage
- Topic: Venturi pipe flow VOF convergence issue
- Replies: 6
- Views: 9994
Venturi pipe flow VOF convergence issue
Dear All, one year ago I discovered Code_Saturne and used it for axisymmetric simulations of internal flows in Venturi pipes used for steel bars cooling. In particular, the steel bar was represented by the bottom moving wall with imposed wall temperature (just for sensitivity analysis purposes). Ven...
- Mon Aug 30, 2021 9:46 am
- Forum: code_saturne usage
- Topic: Inlet pressure boundary condition
- Replies: 2
- Views: 1310
Inlet pressure boundary condition
Good morning, I'd like to impose an inlet pressure instead of an inlet flow. I understand that it is required to use a subroutine but I don't know how to do it. So far I just learned to use the GUI. Even though the analisys could be less stable, it would suite directly my problem and experimental co...
- Mon Aug 30, 2021 9:12 am
- Forum: code_saturne usage
- Topic: Flow through a surface
- Replies: 1
- Views: 996
Flow through a surface
Good morning, I'd like to select a surface (both boundary or internal) in Paraview and calculate the fluid flow (m3/s) by integrating the speed. I can do it with "slice" and "integrate variables" functions in Paraview but when simulations and slices are several, it becomes annoyi...
- Mon Jul 12, 2021 11:32 am
- Forum: code_saturne usage
- Topic: 2D axisymmetric steady state flow with moving wall heat transfer
- Replies: 19
- Views: 6076
Re: 2D axisymmetric steady state flow with moving wall heat transfer
Good morning.
I can use both C or Fortran, but since in the future you will move to C only then I'd prefer to study a C example.
Thank you very much.
Lorenzo
I can use both C or Fortran, but since in the future you will move to C only then I'd prefer to study a C example.
Thank you very much.
Lorenzo
- Wed Jul 07, 2021 1:58 pm
- Forum: code_saturne usage
- Topic: 2D axisymmetric steady state flow with moving wall heat transfer
- Replies: 19
- Views: 6076
Re: 2D axisymmetric steady state flow with moving wall heat transfer
Dear Yvan, I think that your second option would be fine, since the bar shape is simple and the calculation would be faster. To begin with, I'd like to model each longitudinal section of the the bar like a uniform radial temperature field (Biot number < 0.1) in order to learn how to implement the su...
- Fri Jul 02, 2021 2:53 pm
- Forum: code_saturne usage
- Topic: 2D axisymmetric steady state flow with moving wall heat transfer
- Replies: 19
- Views: 6076
Re: 2D axisymmetric steady state flow with moving wall heat transfer
Dear Yvan,
hope you're doing well!
Concerning the bulk velocity in the sliding walls to simulate heat transfer (using a user-subroutine but staying on the simple side as per your trailing messages) is there any news?
Thank you thousand!
Have a nice day.
Lorenzo
hope you're doing well!
Concerning the bulk velocity in the sliding walls to simulate heat transfer (using a user-subroutine but staying on the simple side as per your trailing messages) is there any news?
Thank you thousand!
Have a nice day.
Lorenzo