[Pieter]

I'm new to snappyhexmesh and have problem. It looks like shm is not snapping around the surface. I'm trying to mesh a simple elbow.
I have a attached a snapshot of what it looks like.
snap.jpg
I've also attached my stl, blockmesh, surface extract and shm dict as well

of.zip

Is there anybody who can help me with this?

KR

[Antimony]

Hi,

There are a couple of errors in your snappyHexMeshDict.

1. Under the geometry section, yours reads:

pipe.stl
{
type triSurfaceMesh;
name flange;
}

Instead of flange, it should be the name of the STL file itself. So in this case it should read pipe

2. You have not defined a refinement region in the geometry section and yet you are calling one in the refinementRegions section. The STL cannot double up as the volume where the mesh needs to be refined. You will need to specify a different region name and its type/extents before you can use the volumetric refinement.

3. Your syntax for the refinementRegions needs to be modified. You need to specify "levels" instead of "level" and the "mode" as well. Refer to the user guide for more details.

Hope this helps.

Cheers,
Antimony

[akidess]

Originally Posted by Antimony

1. Under the geometry section, yours reads:

Instead of flange, it should be the name of the STL file itself. So in this case it should read pipe

Pretty sure this is not true.

[Antimony]

Hi,

Maybe I didn't phrase it in the right way. But that is what I have observed, and what was confirmed when I tested this same case with:

Run A: name flange; => does not give a mesh
Run B: name pipe; => able to generate the mesh

sHM gives out warning messages saying that the geometry of the pipe can't be found for run A and just stops halfway.

Cheers,
Antimony

[akidess]

If you change the name to "flange", you also need to modify the according entry in the refinement surfaces. Did you do that?

As an example, you can have a look at:
tutorials/multiphase/interDyMFoam/ras/DTCHull/system/snappyHexMeshDict

[Antimony]

Hi,

I wasn't aware that what was needed was for the <xyz> in "name <xyz>" was the critical one. Always thought it was the file name and consequently made it consistent in the "geometry" and "refinementSurfaces" fields.

Thanks for this heads up!

Cheers,
Antimony

[Pieter]

It worked thanks for the replies!