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How to simulate the flow of the particles (like sand) inside a pipeline?

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Old   January 29, 2015, 10:00
Default How to simulate the flow of the particles (like sand) inside a pipeline?
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libo
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hi,all
i want to simulation the flow of the particles(like sand) in pipeline,but i don`t konw how to do this use openfoam(I'm learning openfoam for three days ).
please give me some advice or example
thank you!
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Old   February 5, 2015, 11:23
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Hello libo,

There are various options I think to do this, perhaps I am not even mentioning all of them.

There is a Two Fluid Model in OpenFOAM (called twoPhaseEulerFoam) which has tutorial cases for a fluidized bed, which is quite close to the application you are asking for (gas-solid flow). You could use this to simulate solids flow, you just have to change the domain a little bit and your boundaries. The disadvantage of this solver is that the theory behind the solids flow and rheology (Kinetic Theory of Granular Flow) is not very easy to understand on a fundamental level.

Also there are lagrangian solvers like DPMFoam and MPPICFoam that simulate the solids phase as parcels. I guess this comes closer to 'real' gas-solid systems. I do not know a lot about these solvers though.

Finally, there is something called LIGGGHTS and CFDEM; LIGGGHTS is a Discrete Element Method package and CFDEM is the LIGGGHTS package coupled with OpenFOAM (which calculates the gas flow part). See the link:
http://www.cfdem.com/about-cfdemrproject

Hope this helps a little bit. First make sure you have some experience with the most basic tutorials such as damBreak and cavity.

Kind regards,
Ramon
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Old   February 5, 2015, 22:04
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Dear Ramon,
Thanks for your reply.I`m so sorry,I did not descripbe my problem very clearly.I don`t want to simulate gas-solid flow.I want to simulate liquid-solid flow(some solid particle flow in the oil pipeline).I have been use the fluent-edem but my teacher wants me find other software to sovle this problem.
I have been read a literature ,the lagrangian solvers don`t consider the force to particle-particle,we need program the code by ourselves(the author use the Discrete Element Method).I think is too difficult for me.Is there some model about drag force,Magnus force,Saffman force in OpenFOAM?
Thank you so much!
LiBo
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Old   February 6, 2015, 04:49
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I think solid-liquid flow should as well be possible with CFDEM, see this link:

http://web.student.chalmers.se/group...SlidesOFW5.pdf

Also the forces you have mentioned should be in the model (I have not checked this myself though).

I am not sure whether these forces are also in an OpenFOAM model, I know there is no particle rotation force in twoPhaseEulerFoam for example, but I am not sure about the other two models I have mentioned. You can always look into the source codes of the solvers I have mentioned in the applications/solvers/ folder, then you can see which forces have been taken into account.

Programming your own DEM or DPM code is quite time consuming, it is even difficult to do this properly within a full PhD project (I have some experience with this...). Keep in mind that when modeling oil-solid flow that most flow solvers do not take the non-Newtonian behavior of the oil into account. Either you will have to edit the flow solver and mess around with the stress tensors, or you have to use a non-Newtonian solver and implement the fluid-particle interactions (which sounds like more work to me).

Kind regards,
Ramon
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Old   February 6, 2015, 07:03
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Thanks you again.
LiBo
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Old   February 8, 2017, 01:13
Default Solid Flow
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I want to simulate the solid flow inside the Iron blast Furnace . I have to take care of only solid nothing else . so is there any Solver there for solid flow simulation . Please help me .
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Old   May 23, 2017, 03:14
Default Error with DPM
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Hi. I have a problem. I used DPM solver for my project .First i changed the blockMesh without changing the kinematic cloud pisition file ,then changing the kinematic cloud pisition file without changing the blockmesh. For both of them the error is "Cannot find parcel injection cell".Please help me.
Both of work were attached.
Attached Files
File Type: gz Goldschmidt blockmesh.tar.gz (72.7 KB, 8 views)
File Type: gz Goldschmidt position.tar.gz (181.5 KB, 7 views)
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Old   November 1, 2017, 09:51
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May be too late for you m_snjri but I'll anwer that:

In the blockMesh-file you have the convertToMeters option before defining the vertices. This could make the dimension of your whole Mesh too small.
A second one, which is more likely, is your negative values in the kinematicCloudPosition file. Your blockMesh is not defined for those (60x10x50).
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