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[mesh manipulation] splitting boundary patch into several patches

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Old   March 27, 2013, 05:33
Default splitting boundary patch into several patches
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Andreas Wendy
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Hi everybody,

is there a posibility after running snappyhexmesh etc. a boundary patch in for example 6 pieces along one direction?

the problem is the following:
i splitted a blade in 6 different stl files. the geometry is allways the same but at the region where 2 parts are connected the layer mesh looks very bad. so i want to mesh it as a single patch and splitt it afterwarts into several patches. so that i can extract forces along the blade.

is there a possibility?

best wishes

Andy
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Old   April 2, 2013, 09:06
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nobody an idea?
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Old   April 2, 2013, 09:41
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Håkon Strandenes
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Have you seen the new feature in version 2.2 that allows you to do approximately what you want, i.e. write forces in "bins" along a specific direction?

See the release notes: http://www.openfoam.org/version2.2.0...processing.php
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Old   April 3, 2013, 02:46
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Andreas Wendy
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Quote:
Originally Posted by haakon View Post
Have you seen the new feature in version 2.2 that allows you to do approximately what you want, i.e. write forces in "bins" along a specific direction?

See the release notes: http://www.openfoam.org/version2.2.0...processing.php
hi,

i have to work with OpenFOAM 1.6 extend. Do you know if i can calculate the Forces after finisching the computation?
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Old   April 3, 2013, 03:23
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Håkon Strandenes
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In the case of using 1.6-ext I have no ideas (other than splitting the boundary patch as you suggested). Sorry.

(Perhaps you can take this piece of code back into 1.6-ext? I guess this part is pretty similar).
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Old   April 15, 2013, 02:50
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Akshay Kumar
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Hi AW!

Since you have those individual STL's, you could use them to create a faceSet( use topoSet). This faceSet can then be used to create patches using createPatch and you could call your force functions to calculate on these patches. This might work.

Cheers!
Akshay
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Old   April 15, 2013, 02:59
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Akshay Kumar
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Or...
You could use 'sample' utility. This works on STLs. But i doubt if the extend version has the 'SampledtriSurfaceMesh' type. But I believe you could setup the 2.1 'sample' code in your environment.

Cheers
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