code_saturne User's Forum

Please don't repeat the same question in mutiple post.

viewtopic.php?p=15975#p15975

Hello,

The difference between solutions is because you are running two different cases. Please check the definition of the norm of a vector( ||\mathbf v||=\sqrt{x^2+y^2+z^2} ). When you use the GUI the norm is set to 3 m/s (vx=vy=vz=0.707m/s) and when you use the user define function you are ...

Hello,


I had used the specified coordinates, but I am so confuse about this set. maybe when I set the coordinates x=1, y=-1, z=1, it means that the coordinate is like the picture ?
and the coordinate x=3, y=-3, z=3 is equal to the x=1, y=-1, z=1 ? or 3 is the unit length?


You have to set the ...

Hello,


Recently I want to use python scripts to set the boundary conditions.
but when I simulate the simple case, I saw the result is not my want.

The code that you post uses Fortran, not python.


I didn't find the v and w direction set in GUI


To set the x,y,z directions for the velocity ...

Hello,

When do you mention that " the indexes inside them are different from the ones contained in the ifac_test array" , the values or the order are different?

Why are you doing this? "ifac_local_r = real(ifac_local)". It should be a integer list.

And about the face_dz() matrix, you are filling ...

Hello Yvan and Benoît,

I have changed the approach and follow this article https://www.researchgate.net/publication/267594307_Prediction_of_Boiling_and_Critical_Heat_Flux_Using_an_Eulerian_Multiphase_Boiling_Model to avoid the "semi-mechanical" correlations.

I have added the vaporization ...

Hello Benoît for your answer,

I modify the cavitation_compute_source_term as a function of the saturation temperature and this part is working.

As you mention in your answer, now I have to add to the energy equation the vaporization/condensation energy due to the phase change (latent heat).

Also ...

Hello,

I'm solving a problem that involves a phase change (water-vapor) in a heat exchanger. My question is if the Merkle (mass transfer) model implemented in the cavitation module can be adapted/modified to produce void fraction as a function of the saturation temperature.

The idea is to ...

Hello,

But you are solving the dam break problem, you don't need an inlet boundary condition.

Check this post(viewtopic.php?f=2&t=2830) where I set the void fraction to an inlet boundary condition.

Regards,
Luciano

Hello,

May be I am wrong, but I think that you should use single quotes '...' for string criteria and not single closing quotes ’..’.

Regards,
Luciano