code_saturne User's Forum

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...

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) ...

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...

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...

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...

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...

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...

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

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...

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