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blockMesh non-uniform grid

Posted November 10, 2016 at 14:32 by kindle
This way we can estimate already order of magnitude.

Quote:
Originally Posted by hjasak View Post
Actually, the grading factor in blockMesh is defined as the ratio of the last to first cell size, which is much better behaved that defining the number of cells and the geometric expansion ratio. I suppose we have both done the same thing :-)

Hrv
New Member
Posted in Pre-processing
Views 2206 Comments 0 kindle is offline Edit Tags
Old

Customized fvOptions-class for momentum source: no rule to make target

Posted November 10, 2016 at 13:00 by kindle
Updated February 23, 2017 at 04:06 by kindle
Another one

Quote:
Originally Posted by potentialFoam View Post
Dear Foamers,

I would like to create my own fvOptions-class to introduce a momentum source term. (Unfortunately, none of the existing classes help me.)

Approach:
I copied the 'actuationDiskSource'-folder,
I renamed the files and names inside from 'actuationDisk...' to 'newSource...',
I added the 'newSource.C'-file in '$FOAM_SRC/fvOptions/Make/files',
then I tried to compile it with 'wmake' and 'wmake libso'.
...
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New Member
Posted in programming
Views 953 Comments 0 kindle is offline Edit Tags
Old

channel395 : Using fvOptions to add a momentum source

Posted November 10, 2016 at 12:57 by kindle
Updated October 16, 2017 at 06:15 by kindle
The problem in channel395
Quote:
Originally Posted by huangxianbei View Post
After a period of searching , I continue my calculation for a much longer time, the velocity at the domain center oscillating around 0.15m/s(the Ubar=0.1335m/s), about 1.1times. So this is exactly what it should be. The first problem is solved.

However, I'm still not quite understand the second problem. How can we initialize the p ,nusgs fields? Or my misunderstanding, just perturbU required for the velocity field?
And fvOptions in channel395...
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New Member
Posted in programming
Views 1507 Comments 0 kindle is offline Edit Tags
Old

paraview-python

Posted November 9, 2016 at 06:14 by kindle
Updated November 9, 2016 at 10:50 by kindle
Requirement : paraview not the wrapper paraFoam of Openfoam [maybe because it is partially compiled].

1. start paraview
2. tools - start trace
3. openfile (with *.foam)
4. ...
5. save image etc.
6. stop trace and a window will pop out with python script
7. creat pythonScript.py
8. run with pvpython (executable in paraview) or add on first line like #!/opt/ParaView-4.1.0-Linux-64bit/bin/pvpython
9. chmod +x pythonScript.py ; execute pythonScript.py...
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Posted in Post-processing
Views 910 Comments 0 kindle is offline Edit Tags
Old

Point data -> Cell data

Posted October 26, 2016 at 11:00 by kindle
Updated November 14, 2016 at 13:33 by kindle
Get cell data from paraview

Quote:
Originally Posted by wyldckat View Post
Greetings Philipp,

Took me a while to think about this, but I believe I know what you're looking for. The steps should be as follows:
  1. Apply the "Slice" filter, along the direction of your original line.
  2. Apply a second "Slice" filter, applied to the first one, along the location of the intended line.
  3. You should now have the same line you originally intended, but with some extra information that the "Plot over
...
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Posted in Post-processing
Views 1280 Comments 0 kindle is offline Edit Tags
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