[CAD formats] application of ASCII STL in different systems

ljjouc · August 27, 2014, 04:14

Hi, everyone,

I plan to use snappyHexMesh utility to produce computation grids, and first, a geometrical ascii stl file is needed.

Now, I use a CAD software in a Windows system to produce the stl file. However. the openFoam has been intalled in the Opensuse Linux system. So, my question is whether the stl file can be directly recognized and used by the snappyHexMesh? If not, what procedures shall I take to make use of this stl file ?

Any help is greatly appreciated.

Kai

jokerito · August 29, 2014, 03:50

Hello Kai

The stl file from Windows works perfectly with Linux. But you should export the stl file as ASCII stl (you can choose between binary and ASCII in your CAD program). After that the ASCII should look like the following

Code:

solid
 facet normal  8.829476e-01 -0.000000e+00  4.694716e-01
   outer loop
     vertex  1.371324e+01  1.850000e+00  1.531920e+01
     vertex  2.008395e+01 -3.011765e+00  3.337644e+00
     vertex  2.008395e+01  1.850000e+00  3.337644e+00
   endloop
 endfacet
endsolid

and you can add it in your snappyHexMeshDict.

Please feel free to ask if you have any further questions.

Best Regards,
Mike

ljjouc · August 29, 2014, 04:14

Hi. Mike.

Thanks very much for your kind help. I guess that you have
made a test to validate the perfect suitability of ascii stl file in windows to linux.
Next. I will confidently constuct my model in a CAD software.

Best wishes.
Kai

August 27, 2014, 04:14	application of ASCII STL in different systems	#1
ljjouc New Member Kai Liang Join Date: Nov 2013 Posts: 19 Rep Power: 12	Hi, everyone, I plan to use snappyHexMesh utility to produce computation grids, and first, a geometrical ascii stl file is needed. Now, I use a CAD software in a Windows system to produce the stl file. However. the openFoam has been intalled in the Opensuse Linux system. So, my question is whether the stl file can be directly recognized and used by the snappyHexMesh? If not, what procedures shall I take to make use of this stl file ? Any help is greatly appreciated. Kai

August 29, 2014, 03:50		#2
jokerito New Member Join Date: Jul 2014 Posts: 22 Rep Power: 11	Hello Kai The stl file from Windows works perfectly with Linux. But you should export the stl file as ASCII stl (you can choose between binary and ASCII in your CAD program). After that the ASCII should look like the following Code: solid facet normal 8.829476e-01 -0.000000e+00 4.694716e-01 outer loop vertex 1.371324e+01 1.850000e+00 1.531920e+01 vertex 2.008395e+01 -3.011765e+00 3.337644e+00 vertex 2.008395e+01 1.850000e+00 3.337644e+00 endloop endfacet endsolid and you can add it in your snappyHexMeshDict. Please feel free to ask if you have any further questions. Best Regards, Mike

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August 29, 2014, 04:14		#3
ljjouc New Member Kai Liang Join Date: Nov 2013 Posts: 19 Rep Power: 12	Hi. Mike. Thanks very much for your kind help. I guess that you have made a test to validate the perfect suitability of ascii stl file in windows to linux. Next. I will confidently constuct my model in a CAD software. Best wishes. Kai