Multiple surfaces in one stl file

Hello everyone,
I’m trying to use SketchUp pro to do some CFD simulations with OpenFoam. I have a reactor (cylinder) compose of top, bottom, walls, inflow, and outflow. I need to export one stl file from SketchUp that is able to separate the different surfaces, for example:

solid inflow
facet normal -0.3564144372940063 0.9343279600143433 0
outer loop
vertex -0.2191781401634216 0.5639024376869202 1.460000038146973


endfacet
endsolid inflow

solid outflow
facet normal 0 -1 -4.725144429375272e-13
outer loop
vertex 0.001959674758836627 0.2793013155460358 0.002559198066592216


endfacet
endsolid outflow

and so on with the other surfaces.

I haven’t been able to name the different surfaces. I tried with the MeshKit extension, but when I opened the stl file, it doesn’t separate into the different surfaces…any idea if its possible?

Thank you in advance for any orientation…

Greetings,

from the Wikipedia description I would think that there’s only one solid name (optional file name) per STL file possible?

I’m not sure I understand the question, but Ibelieve it is possible to combine several solid groups/components into one STL…

Hello, thank you for the answer. I have seen son examples where it seems to be possible to have more than one solid defined in one stl, for example:
[snappyHexMesh] SnappyHexMesh with local refinement of ONE STLfile -- CFD Online Discussion Forums.
In the Input.stl of this example the defined “NumberOne” and “NumberTwo” in one stl file.

Thanks!

Hello, thanks for answering. When I prepared the geometry combining different solid components and then I exported it as stl.file, I see only one solid in the file:

solid F8E8
facet normal -0.3564144372940063 0.9343279600143433 0
outer loop
vertex -0.2191781401634216 0.5639024376869202 1.460000038146973



endfacet
endsolid solid F8E8

This occurs despite having defined different solid components in the geometry…

Thanks!