[anuragm]

Hi everyone,

I am trying to using blockMesh to create a simple 3D cylinder with a hole in one of the curved sides. The final geometry/mesh would be more complicated but this is a starting point. The aim is to have two cylinders, with one continuing through another at a 90° angle. But I think this point of intersection is where I would face the most problem. I tried it and have a 2D model already but I could not wrap my head around how to achieve this in 3D.

Is there a tutorial/example that does this? If not, what would be a good way to approach this problem?

I have attached a 2-D representation of my geometry as well!

Thanks in advance!

[Antimony]

Hi,

Personally, looking at your geometry, I think blockMesh will probably not be the most suitable one for you.

I assume you can generate the CAD model. If so, snappyHexMesh would be a much better tool for you (than blockMesh) especially since you are dealing with complicated shapes.

Cheers,
Antimony

[anuragm]

Hi, Thanks for your reply.

I had come to the same conclusion myself but there was still a bit of uncertainty in my mind. So thanks for confirming that blockMesh is not the right tool for this job. I have made a STL geometry (but its not perfect as I made it using ICEM), and I tried to generate a mesh using cfMesh but there is no possibility of using O-grid in cfMesh. I am re-doing the geometry using Salome now, and will try the same process with snappyHexMesh.

[Antimony]

Hi,

I was looking through blockMesh again (searching for something else) when I noticed that the newer version (OF 5) has been updated to handle cylinders and spheres (point projection) which might be of use to you...

Check out section 5.3.3: https://cfd.direct/openfoam/user-guide/blockmesh/

Cheers,
Antimony

[anuragm]

Originally Posted by Antimony

Hi,

I was looking through blockMesh again (searching for something else) when I noticed that the newer version (OF 5) has been updated to handle cylinders and spheres (point projection) which might be of use to you...

Check out section 5.3.3: https://cfd.direct/openfoam/user-guide/blockmesh/

Cheers,
Antimony

Thanks for this information. This looks interesting, indeed!

This is quite new for me & I am just thinking out loud at the moment but perhaps I could project 3 vertices from the angular pipe onto the cylinder body and then define an arc using them. This has to be done for each outer O-grid block, right? I will look into it this weekend.