[jiejie]

Hi, I am new to use OpenFoam.

I am trying to simulate the bubble dispersion behind a circular cylinder with Lagrangian paticle tacking in OpenFOAM. Basically, I am going to integrate the bubble motion equations with the velocity data to get bubble position.

I found there are four lagrangian solvers in OpenFOAM: coalChemistryFoam, porousExplicitSourceReactingParticelFoam, reactingParcelFoam and uncoupledKinematicParcelFoam.

(1) Should I use "uncoupledKinematicParcelFoam"?

(2) What if I wanna do 2 way coupling between the bubbles and fluids?

(3) Should I modify the existing solver to implement what I need to do?

Thank you very much.

[jiejie]

Does anyone doing Lagrangian particle tracking?

Cheers

[83_Ale_83]

I join this thread because could be usefull also for me..I'am trying to simulate particle tracking around a cylinder

[83_Ale_83]

Nobody can help us???

[santosh13.patil]

Hello:
I am also facing the same dilemma about "uncoupledKinematicParcelFoam". Whether the solver supports two way coupling?
I can see the option "coupled true;" in properties file "constant/kinematicCloudProperties". But from the solver name, I feel that it it might be uncoupled (???). I am not very conversant with the solver code and could not trace whether it is implemented or not?

Can anybody help?

[Edison_Ge]

From the source code, I see no coupling between Lagrangian and Eulerian FV schemes. It's a pure Lagiangian solver.
take a look at the wiki http://openfoamwiki.net/index.php/Sig_Multiphase
Hoping it's helpful to you.

[santosh13.patil]

Thanks Edison_Ge for the reply. Fortunately I do not have to do two-coupling for my problem, hence I can use it as it is.

[Noggin]

For the uncoupledKinematicParcelFoam the velocity field, temperature field and other bits are read in at the beginning but do not change with time. Only the lagrangian particles are evolved. (Also there is no tutorial case for this it seems).

There is another lagrangian application kept in the tutorials, called rhoPisoTwinParcelFoam (it is exemplifying both the kinematic cloud and the thermo cloud) . I'm not sure why it is kept there.

I have a question about the boundary conditions on any of the lagrangian codes. The ManualInjection option inputs parcels at a given point in time. The ConeInjection method would appear to be the method of choice if I want to stream particles over a period of time. Using the above code, I altered the injection method to the Cone method (for which the code was already written), but unfortunately there was no output in paraview, although it appeared in the output written to screen as though there was a one-off injection of particles. Has anyone else had problems with this? What am I doing wrong!?

[santosh13.patil]

It is not possible to post-process Lagrangian particle in OpenFOAM. But there are ways to do it. See the FAQ 6.1 on below link.
http://openfoamwiki.net/index.php/Main_FAQ

[Edison_Ge]

is there a lagrangian folder under the time folder? I'm using paraFoam build in OF1.6 and the particles are clearly shown. just check the object inspector window and make sure you have ticked the lagriange property.

[Noggin]

It turns out the visualization of the lagrangian particles did work, I just hadn't realized how it was done (I'm still not clear, but it appears paraFoam treats the particles as part of a mesh or grid region) - I'm using v1.7.

For the simulations mentioned in the above comments, I think rhoPisoTwinParcelFoam should be fine, although only one of the parcel types would be needed.

[83_Ale_83]

Hello,
is there in openFoam a uncompressible solver for particle traking??

[maysmech]

Hi Foamers,

I am searching for a solver for incompressible particle tacking too.

Any suggestion will be appreciated.

Regards.

[andrewryan]

icoLagrangianFoam uses a two-way coupling I think, while solidParticle uses a one-way coupling. There is no solver using solidParticle, but you can easily create your own, for more info read the concerning page on the OpenFOAM wiki. I'm looking for a paper or something which describes the drag model used in solidParticle. Also I don't agree with some of the implementation details in solidParticle.

[Jonas Ansoni]

Hello!
I need a solver for incompressible particle tacking too. Does anyone have any suggestions?

Best regards.

Originally Posted by maysmech

Hi Foamers,

I am searching for a solver for incompressible particle tacking too.

Any suggestion will be appreciated.

Regards.

[randolph]

Originally Posted by andrewryan

icoLagrangianFoam uses a two-way coupling I think, while solidParticle uses a one-way coupling. There is no solver using solidParticle, but you can easily create your own, for more info read the concerning page on the OpenFOAM wiki. I'm looking for a paper or something which describes the drag model used in solidParticle. Also I don't agree with some of the implementation details in solidParticle.

The drag model in solidParticle is schiller naumann