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Creating a case for uncoupledKinematicParcelFoam (OpenFOAM 1.6)

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Old   November 23, 2009, 13:58
Default Creating a case for uncoupledKinematicParcelFoam (OpenFOAM 1.6)
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Andrew Ryan
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Dear Foamers

I'm trying to understand how the uncoupledKinematicParcelFoam solver works. Unfortunately I could not find a tutorial case for it. Therefore I'm trying to create my own case.

From the description:
Code:
Transient solver for the passive transport of a single kinematic particle could.

Uses a pre- calculated velocity field to evolve the cloud.
So far I figured out that it's looking for the initial positions in 0/lagrangian/kinematicCloud/positions .

The file has the format:

Code:
n
(
( x y z) cellID
..
)
Where n is the number of particles and each row contains the position of the individual particle and the cellID in which it is. (Is this correct?)

This is exactly the problem: How can I figure out in which cell the particle is, given the position. I saw that in some other tutorial (for example the evaporationTest) cases this file is written in all timestep directories (except 0) by the solver.

Whats the way to generate the initial position file? (for now I just want to have a few particles somewhere in my simple mesh)

How can I figure out the id of a cell in paraview? When using foamToVTK I could select to colorize the wireframe by cellIDs [1], this however only works when the mesh is really small. Also the cell IDs did not show up the parallel openfoam reader. Is there another way to see the cell id (for example by clicking on a cell)?

[1] http://emerging-patterns.com/tmp/CellIDs.png
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Old   March 7, 2010, 05:29
Default uncoupledKinematicParcelFoam
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Markus Trenker
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Hi Andrew,

did you succeed with the uncoupledKinematicParcelFoam? I was looking for a tutorial but found your post...

could you make your case work?

cheers
markus
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Old   March 7, 2010, 05:35
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No so far I just used icoLagrangianFoam..
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Old   March 8, 2010, 03:36
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Markus Trenker
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alright..
i played with the rhoPisoTwinParcelFoam yesterday which does particle tracking, however i haven't found out how to visualize them properly ...

cheers
markus
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Old   March 8, 2010, 03:46
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> however i haven't found out how to visualize them properly ...

http://openfoamwiki.net/index.php/Ma...gian_particles

foamToVTK seems to be the only option here..
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Old   March 8, 2010, 05:42
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yes, i agree... i "glyphed" the p-tracks yesterday and it seemed to work...

how are your experiences with icoLagrangianFoam. found a tutorial on the net which says that its "only a demo"....

later
markus
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Old   March 8, 2010, 13:08
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Well I only looked at it to see how LPT works..

This here could be interesting for you: http://www.tfd.chalmers.se/~hani/kur...angianFoam.pdf
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Old   March 8, 2010, 13:52
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thats the tutorial i found as well...thanks

cheers
markus
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