How to turn a STL geometry in OPENFOAM

SnappyMax · April 20, 2017, 09:56

Hi guys,

I´ve got a Problem with my STL geometry because it needs to be turned by 180 degree.
Do you now any possbility to turn it with an Openfoam code instead of using Catia etc.

To me:
I´m a student and I´m a Beginner with Openfoam.

Thank you a lot

Max

Flowkersma · April 20, 2017, 10:11

Hi Max,

Here is a link for the OpenFOAM surface utilities in OFwiki. You are looking for surfaceTransformPoints.
Here is an example command:

Code:

surfaceTransformPoints yourstlfile.stl outputstlfile.stl -rotate "((1 0 0) (0 0 1))"

Best,
Mikko

LVDH · April 21, 2017, 06:07

With rotating by 180° using the "-rotate" command I sometimes had my problems (maybe brain). I find it easier to use "-scale" with a factor of -1 in the direction of your interest.

SnappyMax · April 24, 2017, 14:33

Thank you for your answers!

Unfortunately there is no text in the OFwiki to surfaceTransformPoints...
So i actually don´t now where to put your code Mikko ?
Where do you usually put it?

And to LVDH where can I find this scale ?

Thanks so far!

Max

Flowkersma · April 24, 2017, 16:41

surfaceTransformPoints is an executable which comes with OpenFOAM. So, if you have your OpenFOAM environment loaded just write the name of the utility to the terminal with the parameters (see the command in my previous post). I suggest you to look at the guide to learn the basics of OpenFOAM.

LVDH · April 25, 2017, 07:33

Hi,
sometimes you do not have to look that far.
With OF sourced, just type:

Code:

surfaceTransformPoints -help

This will give you this idea:

Code:

surfaceTransformPoints -scale '(1 -1 1)' <original_file.stl> <mirrored_file.stl>

akidess · April 25, 2017, 07:46

Quote:

Originally Posted by SnappyMax

Unfortunately there is no text in the OFwiki to surfaceTransformPoints...

Surely you will fix that now?

The wiki already has a similar entry for transforming volume meshes you can use as a guideline:
https://openfoamwiki.net/index.php/TransformPoints

By the way, first hit on google:
http://www.sourceflux.de/blog/transf...ansformpoints/

SnappyMax · April 25, 2017, 11:48

Thank you sooo much guys!!

I really did it!

I wish the best to all of you.

Max

April 20, 2017, 09:56	How to turn a STL geometry in OPENFOAM	#1
SnappyMax New Member Max Join Date: Apr 2017 Posts: 3 Rep Power: 9	Hi guys, I´ve got a Problem with my STL geometry because it needs to be turned by 180 degree. Do you now any possbility to turn it with an Openfoam code instead of using Catia etc. To me: I´m a student and I´m a Beginner with Openfoam. Thank you a lot Max

April 20, 2017, 10:11		#2
Flowkersma Senior Member Mikko Join Date: Jul 2014 Location: The Hague, The Netherlands Posts: 243 Rep Power: 12	Hi Max, Here is a link for the OpenFOAM surface utilities in OFwiki. You are looking for surfaceTransformPoints. Here is an example command: Code: surfaceTransformPoints yourstlfile.stl outputstlfile.stl -rotate "((1 0 0) (0 0 1))" Best, Mikko spalartallmaras and fly_light like this.

April 21, 2017, 06:07		#3
LVDH Member Andre Z Join Date: Dec 2009 Posts: 75 Rep Power: 16	With rotating by 180° using the "-rotate" command I sometimes had my problems (maybe brain). I find it easier to use "-scale" with a factor of -1 in the direction of your interest. __________________ www.MantiumCAE.com

April 25, 2017, 07:33		#6
LVDH Member Andre Z Join Date: Dec 2009 Posts: 75 Rep Power: 16	Hi, sometimes you do not have to look that far. With OF sourced, just type: Code: surfaceTransformPoints -help This will give you this idea: Code: surfaceTransformPoints -scale '(1 -1 1)' <original_file.stl> <mirrored_file.stl> __________________ www.MantiumCAE.com

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April 24, 2017, 14:33		#4
SnappyMax New Member Max Join Date: Apr 2017 Posts: 3 Rep Power: 9	Thank you for your answers! Unfortunately there is no text in the OFwiki to surfaceTransformPoints... So i actually don´t now where to put your code Mikko ? Where do you usually put it? And to LVDH where can I find this scale ? Thanks so far! Max

April 24, 2017, 16:41		#5
Flowkersma Senior Member Mikko Join Date: Jul 2014 Location: The Hague, The Netherlands Posts: 243 Rep Power: 12	surfaceTransformPoints is an executable which comes with OpenFOAM. So, if you have your OpenFOAM environment loaded just write the name of the utility to the terminal with the parameters (see the command in my previous post). I suggest you to look at the guide to learn the basics of OpenFOAM.

April 25, 2017, 11:48		#8
SnappyMax New Member Max Join Date: Apr 2017 Posts: 3 Rep Power: 9	Thank you sooo much guys!! I really did it! I wish the best to all of you. Max