Simple ICEM mesh question
 

Right, not sure what is going wrong here, but I can't build a fluid volume mesh within a domain that snaps to the outer domain surface/boundaries.

I've created a simple box to illustrate (attached image).

I create STL files in Blender, and import these into ICEM. I don't run any repair geometry or create/modify surfaces. I don't need to split my surfaces or geometry because I have already done this in Blender. Perhaps I'm wrong on this. I want to keep all the geometry work in Blender.

I proceed through a standard route to generate a mesh, but the Fluid volume mesh doesn't fill the bounding box.

Any help much appreciated. Thanks.

It appears you have only surfaces in your geometry representation. That is not enough.

In order to get a smooth mesh representation of your geometry, you also need curves and points.
Using the Geometry menu, you can extract curves from surfaces. Then from these curves you can extract points.
Then mesh once again.

Thanks Gert-Jan.

I was confused because depending on how I tried to mesh the volume, sometimes it would work and sometimes it wouldn't. That is because ICEM was automatically creating points and curves for me in some instances.

The solution for anyone interested is the create points and curves. If you're geometry is one piece and you need to split it up into different surfaces, then you can probably follow the method proposed by Gert-Jan.

If you already have your patches separate in a number of STL files (inlet, outlet, etc.), then you can use 'Geometry > Build Diagnostic Topology'. This will generate points and surfaces, which you can tell ICEM to snap to when it comes to building the volume mesh.

Thanks Gert-Jan.

I was confused because depending on how I tried to mesh the volume, sometimes it would work and sometimes it wouldn't. That is because ICEM was automatically creating points and curves for me in some instances.

The solution for anyone interested is the create points and curves. If you're geometry is one piece and you need to split it up into different surfaces, then you can probably follow the method proposed by Gert-Jan.

If you already have your patches separate in a number of STL files (inlet, outlet, etc.), then you can use 'Geometry > Build Diagnostic Topology'. This will generate points and surfaces, which you can tell ICEM to snap to when it comes to building the volume mesh.