code_saturne User's Forum

The top picture you post has one cell between the outer wall and the interface. This will not be enough to get anywhere near realistic solutions. Try refining your mesh, it needn't be too far but your current mesh is not suitable. I'm not familiar with Salome's capabilities but look at putting prism...

You should refine your mesh quite a bit

If you show some pictures of the flow-field I might be able to suggest something depending on what the problem is.

You don't call things inlet outlet etc in Salome, as per your previous posts you have things called Face_02 etc, you define what they are in saturne. It's not imaginary (maybe this is the wrong word), it's the interface between your coupling it just isn't a wall or inlet or anything, its just an int...

Hi, For this type of coupling you should not couple at a boundary face but an an interface in the fluid domain. The interface is not a wall but an imaginary boundary between the rotating and stationary parts. So in your image ( http://code-saturne.org/forum/download/file.php?id=126 ) you will be mes...

Hi, The coupling will either give the rotating part a Coriolis source term (icorio=1) or rotate the inner mesh (icorio=0) based on omegax/y/z. At present you give Coriolis source term to the whole fluid volume - so it thinks the outer vanes are rotating too. The velocity vectors you plot are the rel...

As you say saturne only models the fluid and only needs to know there is a wall. You just define the turbine boundary as a wall (iparoi) in usclim.

Have a look at some of the examples to see what I mean but you only need to mesh the fluid.

cheers

Hey, so in 2D this is the meshing strategy you should have. You don't need to mesh the solid outer blades just the fluid around them. Likewise for the inner turbine. So two meshes separated by the cylindrical interface (it doesn't need to be cylindrical but if you want to rotate the mesh it will). A...

Regarding the meshing you only need to mesh the fluid which I don't think you have. I'll draw a picture it might be easier.,.

The mesh is quite coarse. However, there might be an issue with the way you have meshed it (or I have misunderstood the flow). Is the dark blue region meant to be solid even though it is meshed? Also where is the interface between the two regions? I expected that the dark blue was just an outer wall...