How to create BCs?

joerg · May 13, 2010, 00:58

Beginner's question:
I have created the STL- geom and imported it by using snappyHexMesh.
sHM worked well, but how do I get the boundary conditions to OpenFoam?

=> I used DISCRETIZER, but that didn't work very well.

bjornthe · May 17, 2010, 10:28

If you use discretizer-setup.
After you created the snappyHexMesh. Reload that mesh and then choos a solver (simpleFoam etc).
Now you can create BC:s.

Björn

gwierink · May 18, 2010, 04:37

Hi Jörg,

Quote:

how do I get the boundary conditions to OpenFoam?

You should be able to find a list of faces etc in constant/polyMesh/boundary. Then, using these names, you can define the BC's in 0/U 0/p etc.

bjornthe · May 18, 2010, 04:45

You can have a look:
http://www.discretizer.org/node/14

last video shows an example of applying BC:s

Regards
Björn

gwierink · May 19, 2010, 02:34

Hi Björn,

Discretizer looks nice! Thanks for the effort!

joerg · May 21, 2010, 01:06

Thank you Björn and gwierink (what ever that means)!!!
Morning has broken and sim got runnin'.
YaYaYa!!!

Thanks for discretizer! Nice tool - but manual is needed!

(Steps were: Geom in Pro/E=> STL with Pro/E => Editing STL manually (separating inlet/outlet faces) => creating mesh under DISCRETIZER with snappyHexmesh => creating BCs with DISCRETIZER => starting and viewing sim)

Jörg

gwierink · May 21, 2010, 02:34

Hi Jörg,

Good to hear things are running!

Quote:

gwierink (what ever that means)!!!

That means my username, my first name is Gijs for short. Don't tease me with that, I was born with it ...

bjornthe · May 21, 2010, 11:43

I'm setting up an external aero case as a tutorial.

May 13, 2010, 00:58	How to create BCs?	#1
joerg New Member Joerg Lerch-Thies Join Date: Jun 2009 Location: Kassel, Germany Posts: 4 Rep Power: 16	Beginner's question: I have created the STL- geom and imported it by using snappyHexMesh. sHM worked well, but how do I get the boundary conditions to OpenFoam? => I used DISCRETIZER, but that didn't work very well.

May 17, 2010, 10:28		#2
bjornthe Member Björn Bergqvist Join Date: Mar 2009 Location: Gothenburg, Västra Götaland, Sweden Posts: 43 Rep Power: 17	If you use discretizer-setup. After you created the snappyHexMesh. Reload that mesh and then choos a solver (simpleFoam etc). Now you can create BC:s. Björn __________________ ________________________________________ Björn Bergqvist, creator of Discretizer, a free mesh generator for OpenFOAM _________http://www.discretizer.org_____________

May 18, 2010, 04:45		#4
bjornthe Member Björn Bergqvist Join Date: Mar 2009 Location: Gothenburg, Västra Götaland, Sweden Posts: 43 Rep Power: 17	You can have a look: http://www.discretizer.org/node/14 last video shows an example of applying BC:s Regards Björn __________________ ________________________________________ Björn Bergqvist, creator of Discretizer, a free mesh generator for OpenFOAM _________http://www.discretizer.org_____________

May 19, 2010, 02:34		#5
gwierink Senior Member Gijsbert Wierink Join Date: Mar 2009 Posts: 383 Rep Power: 18	Hi Björn, Discretizer looks nice! Thanks for the effort! __________________ Regards, Gijs

May 21, 2010, 01:06	Got it!	#6
joerg New Member Joerg Lerch-Thies Join Date: Jun 2009 Location: Kassel, Germany Posts: 4 Rep Power: 16	Thank you Björn and gwierink (what ever that means)!!! Morning has broken and sim got runnin'. YaYaYa!!! Thanks for discretizer! Nice tool - but manual is needed! (Steps were: Geom in Pro/E=> STL with Pro/E => Editing STL manually (separating inlet/outlet faces) => creating mesh under DISCRETIZER with snappyHexmesh => creating BCs with DISCRETIZER => starting and viewing sim) Jörg

May 21, 2010, 11:43		#8
bjornthe Member Björn Bergqvist Join Date: Mar 2009 Location: Gothenburg, Västra Götaland, Sweden Posts: 43 Rep Power: 17	I'm setting up an external aero case as a tutorial. __________________ ________________________________________ Björn Bergqvist, creator of Discretizer, a free mesh generator for OpenFOAM _________http://www.discretizer.org_____________

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