[Salome] Salome & snappy

batta31 · September 22, 2012, 12:21

Hi to everyone,
I'm trying to generate a mesh with Salome (a 2D airfoil), exporting it as a .stl file and snapping it with a background mesh in order to reproduce a condition of external aerodynamics.
However, I'm failing in the use of snappyHexMesh utility; has anyone any suggestion about how to proceede, any guide to follow...?

Thanks in advance

Simone

colinB · September 24, 2012, 03:54

Dear Simone,

using salome and snappy for such a comparatively simple task is in my opinion
useless, unless you follow a specific plan where you want to use these two
tools.
A better suggestion is to use blockMesh which is sufficient for such a task
and it has been done by many before you.
For references see here:

http://www.cfd-online.com/Forums/ope...-naca0012.html

If you use a different airfoil you can obtain offset data from various
source from the internet and then include them in the blockMesh

I hope the above is of assistance

regards
Colin

batta31 · September 24, 2012, 05:09

Dear ColinB
I thank you very much for your answer; moreover I've seen that you have already helped people with my similar problem so I think I could find out which is my problem with your help. I'll follow your advices as soon as I can, what I would want to know is now the syntax of the polyLine command, (and the other similar ones) which are not suitably described in the UserGuide. I would also want to tell you (since I've seen that you have already discussed about it) if, according to you, it's better to have a rectangular domain or a semicircular domain in front of the airfoil. I can tell you that my simulation will involve a flow over an aifoil in positive/negative incidence.

Thank you very much again for your answer.

colinB · September 25, 2012, 02:44

Dear Simone,

regarding the syntax of the various commands mentioned in that thread
I suggest you to read the various blockMeshDict files which are attached
to that thread.

regarding the domain shape, it is better to use a semi-circular shape
in order to meet all the mesh quality requirements.
However be aware that the files I uploaded are probably square shaped
(as far as I remember), for I was calculating 2-phase cases and therefore I
used an other mesh arrangement.

regards
Colin

September 22, 2012, 12:21	Salome & snappy	#1
batta31 Member Simone Join Date: Sep 2012 Posts: 95 Rep Power: 13	Hi to everyone, I'm trying to generate a mesh with Salome (a 2D airfoil), exporting it as a .stl file and snapping it with a background mesh in order to reproduce a condition of external aerodynamics. However, I'm failing in the use of snappyHexMesh utility; has anyone any suggestion about how to proceede, any guide to follow...? Thanks in advance Simone

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September 24, 2012, 03:54		#2
colinB Senior Member Join Date: Aug 2010 Location: Groningen, The Netherlands Posts: 216 Rep Power: 18	Dear Simone, using salome and snappy for such a comparatively simple task is in my opinion useless, unless you follow a specific plan where you want to use these two tools. A better suggestion is to use blockMesh which is sufficient for such a task and it has been done by many before you. For references see here: http://www.cfd-online.com/Forums/ope...-naca0012.html If you use a different airfoil you can obtain offset data from various source from the internet and then include them in the blockMesh I hope the above is of assistance regards Colin

September 24, 2012, 05:09		#3
batta31 Member Simone Join Date: Sep 2012 Posts: 95 Rep Power: 13	Dear ColinB I thank you very much for your answer; moreover I've seen that you have already helped people with my similar problem so I think I could find out which is my problem with your help. I'll follow your advices as soon as I can, what I would want to know is now the syntax of the polyLine command, (and the other similar ones) which are not suitably described in the UserGuide. I would also want to tell you (since I've seen that you have already discussed about it) if, according to you, it's better to have a rectangular domain or a semicircular domain in front of the airfoil. I can tell you that my simulation will involve a flow over an aifoil in positive/negative incidence. Thank you very much again for your answer.

September 25, 2012, 02:44		#4
colinB Senior Member Join Date: Aug 2010 Location: Groningen, The Netherlands Posts: 216 Rep Power: 18	Dear Simone, regarding the syntax of the various commands mentioned in that thread I suggest you to read the various blockMeshDict files which are attached to that thread. regarding the domain shape, it is better to use a semi-circular shape in order to meet all the mesh quality requirements. However be aware that the files I uploaded are probably square shaped (as far as I remember), for I was calculating 2-phase cases and therefore I used an other mesh arrangement. regards Colin