Mesh with empty box

latvietis · January 31, 2012, 19:37

Hello foamers!

I would like to create a structure shown in image below attached.

What ideas can you offer? Is there a way that I could just make one large block, then define smaller block inside the larger and somehow tell that smaller block actually is a hole?

elvis · February 1, 2012, 02:32

Hi,

this can be done with snappyHexMesh
http://www.openfoam.org/docs/user/sn...#x26-1510005.4

the empty box is your STL-file the outer box is a Blockmesh-file

latvietis · February 1, 2012, 08:13

Oh, I was thinking about this, but I won't have any stl file. I can't make them since I don't have proper program. It is true, that I can get stl from some kind of design program like AutoCAD or similar?

wyldckat · February 1, 2012, 09:06

Greetings to all!

You can always use Blender. Here is a very nice tutorial for an older version of Blender: http://engits.eu/wiki/index.php/Tuto...der_and_enGrid - it also explains how to use an older version of enGrid as well, which is a mesh generator (and more) that can work with OpenFOAM

If you browse that wiki, you should find more information about the latest version of enGrid, in case you are interested.

Other than Blender, there are several free and open source 3D CAD applications out there! FreeCAD, QCAD, Google Sketch Up, just to name a few.

Best regards,
Bruno

elvis · February 1, 2012, 10:22

Hi,

Bruno is right you can get STL-files from many Programs.
Google Sketchup might do it as well
Salome can create STL and/or meshes can be imported via UNV ideasUnvToFoam ( http://www.caelinux.org/wiki/index.p...ELinux_2007.29 )or directly from pythonflu

February 1, 2012, 09:06		#4
wyldckat Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 4,516 Blog Entries: 31 Rep Power: 47	Greetings to all! You can always use Blender. Here is a very nice tutorial for an older version of Blender: http://engits.eu/wiki/index.php/Tuto...der_and_enGrid - it also explains how to use an older version of enGrid as well, which is a mesh generator (and more) that can work with OpenFOAM If you browse that wiki, you should find more information about the latest version of enGrid, in case you are interested. Other than Blender, there are several free and open source 3D CAD applications out there! FreeCAD, QCAD, Google Sketch Up, just to name a few. Best regards, Bruno __________________ How to build OpenFOAM + Third Party tools How to post code using [CODE]

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February 1, 2012, 02:32		#2
elvis Senior Member Elvis Join Date: Mar 2009 Location: Sindelfingen, Germany Posts: 413 Blog Entries: 4 Rep Power: 11	Hi, this can be done with snappyHexMesh http://www.openfoam.org/docs/user/sn...#x26-1510005.4 the empty box is your STL-file the outer box is a Blockmesh-file

February 1, 2012, 08:13		#3
latvietis Member Martin Join Date: Dec 2011 Location: Latvia Posts: 52 Rep Power: 3	Oh, I was thinking about this, but I won't have any stl file. I can't make them since I don't have proper program. It is true, that I can get stl from some kind of design program like AutoCAD or similar?

February 1, 2012, 10:22		#5
elvis Senior Member Elvis Join Date: Mar 2009 Location: Sindelfingen, Germany Posts: 413 Blog Entries: 4 Rep Power: 11	Hi, Bruno is right you can get STL-files from many Programs. Google Sketchup might do it as well Salome can create STL and/or meshes can be imported via UNV ideasUnvToFoam ( http://www.caelinux.org/wiki/index.p...ELinux_2007.29 )or directly from pythonflu