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kamranian September 18, 2011 03:26

Hi Foamers,

I`m particularly interested in DEM-CFD coupling. My question is about icoUncoupledKinematicParcelFoam. The solver name includes `uncoupled` which leads me to the conclusion that is not capable of solving coupled problems.
Could please anybody clarify if coupling by interaction of fluid and particles (forces) is already possible in OpenFoam v2.0 or if the coupling is still work in progress ?
If OpenFoam v2.0 already includes some coupling functionality what source files should I look at ?
I also checked the doxygen documentation and could not find anything about icoUncoupledKinematicParcelFoam solver yet.
Is there any document or tutorial that shown the procedure of modeling and modeling parameters?

Best Regards,
A. Kamranian

AMahrla September 20, 2011 10:42


The icoUncoupledKinematicParcelFoam is only a coupled solver in the sense that particle-particle interaction is considered. Any coupling between fluid and particulate phase is neglected.

Please refer also to this thread!



kamranian September 21, 2011 04:04

Dear Astrid,

Thank you for your reply. If it is possible to couple this solver with fluid interaction? I am interested to use CFD-DEM to simulation of four-way coupling via OpenFOAM. Can I do it in OpenFOAM? Do you have any recommand for me?

A. Kamranian

AMahrla September 21, 2011 05:40

Hi again!

The implementation of coupling to the continuous phase should be possible, but IMO you have to dig into the code around the particle class which is not THAT top level..

Maybe you can find a starting point within the tutorials on extend-wiki and get to know the implementation of particles in OpenFOAM?



Toorop November 18, 2011 10:28


I'm investigating how to track particles within the fluid domain in OpenFOAM.

Initially, I thought that there's a simple method to perform one-way coupling with basic solvers (icoFoam, pisoFoam, pimpleFoam) - solidParticle class describes itself as a spherical particle class with one-way coupling with the continuous phase. Unfortunately didn't find anything. Instead, there's some tutorials about how to "hack" it into a desired solver. So is there an elegant interface where one can describe passive particle (parcel) cloud / emission?

At first, I thought that icoUncoupledKinematicParcelFoam can handle this sort of simulations - is it possible to couple this with another solver?

gara1988 January 18, 2013 06:01

Hello Toorop, Have you find a solution of you question? I have the same problem.

rama13 July 14, 2014 13:05

Hi Foamers,

I have a very simple question for you.

1) icoUncoupledKinematicParcelFoam solves for the interaction between particles as pointed out here (and if you look into the code no continuum phase is solved).

2) in the User Guide it is describerd as "Transient solver for the passive transport of a single kinematic particle could"

3) if you look into the case directory there is a 0/U field in which (my guess) you can set the velocity field at which your particles get convected away, and I think is what has been done in this nice video.

My question is: if particles get carried away by the fluid

1) they cannot bump into other particles since two streamlines does not collide (so no need to solve interaction)

2) even if they would, they will get a different momentum from the fluid particles they are going with, so they will be no more "passive":confused:?!

I hope someone more expert than me can point me out the clue:)!

Thanks for your attention,

Tobi July 5, 2016 10:17


old thread but due to the fact that other people may read it in feature too I will give a clearer answer.

icoUncoupledParcelFoam is a transient solver for passive parcel motion. That means that the particels do not influence the fluid but the parcels can interact between each other. If you think the particels are just moving along the streamlines, then you are wrong because for the particels we solve drag forces and so on that will finally change the direction of the particel. Just imagine a hydrocyclone. The particels will not follow the flow due to additional forces that act on the particels (like inertia). Depending on the particels properties (density, diameter and so forth), the parcels follow more or less the streamlines of the flow.

rama13 July 5, 2016 10:31

Thank you very much for your answer Toby!

Tobi July 5, 2016 10:36


you 're welcome but I think you already knew it (: (after the long time)

rama13 July 5, 2016 10:42

All the same, a reliable confirmation is always useful, and a kind reply is always good accepted!! Thanks again!

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