[snappyHexMesh] Define faces of complex body as surface STLs forming a closed domain

Awak · March 31, 2016, 22:26

Hello,

My current simulation requires that I define around 10 patches on the geometry that I am using, say inlet/outlet/cyclic/wall, and others... I want to use SHM for meshing. When I run SHM on the full geometry, the meshing process occurs without any problem. However, when I export faces from this solid body in Inventor, save them as separate STLs under different names (that are my patches), surfaceCheck tells me that my geometry is no longer closed, so I can't define my patches.

I am pretty sure many people face my problem, and that even more people are very used to doing such surface manipulations on a daily basis, so I would like to have your advice on how to proceed, starting from a CAD solid model, to create STL surfaces that, once put together, defined a closed volume (that of the initial solid).

I already tried using Salome, but exporting STLs from Salome results in poor quality and also gaps between surfaces that are initially joined. The "stitch" tool of Inventor, stitches my surfaces, but also merges them so that I cannot export the stitched surfaces separately.

Could you please help me on this?

Florian

Awak · April 12, 2016, 21:46

I found a method that is working fine and enables me to output STL surfaces of excellent quality, matching together and forming a closed surface. I used the AutoDesk suite (free for students), namely Fusion360.

For further detail feel free to PM me,

Florian

March 31, 2016, 22:26	Define faces of complex body as surface STLs forming a closed domain	#1
Awak New Member Florian Nguyen Join Date: Oct 2015 Location: Tokyo, Japan Posts: 19 Rep Power: 10	Hello, My current simulation requires that I define around 10 patches on the geometry that I am using, say inlet/outlet/cyclic/wall, and others... I want to use SHM for meshing. When I run SHM on the full geometry, the meshing process occurs without any problem. However, when I export faces from this solid body in Inventor, save them as separate STLs under different names (that are my patches), surfaceCheck tells me that my geometry is no longer closed, so I can't define my patches. I am pretty sure many people face my problem, and that even more people are very used to doing such surface manipulations on a daily basis, so I would like to have your advice on how to proceed, starting from a CAD solid model, to create STL surfaces that, once put together, defined a closed volume (that of the initial solid). I already tried using Salome, but exporting STLs from Salome results in poor quality and also gaps between surfaces that are initially joined. The "stitch" tool of Inventor, stitches my surfaces, but also merges them so that I cannot export the stitched surfaces separately. Could you please help me on this? Florian

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April 12, 2016, 21:46		#2
Awak New Member Florian Nguyen Join Date: Oct 2015 Location: Tokyo, Japan Posts: 19 Rep Power: 10	I found a method that is working fine and enables me to output STL surfaces of excellent quality, matching together and forming a closed surface. I used the AutoDesk suite (free for students), namely Fusion360. For further detail feel free to PM me, Florian