[sarah37]

Hi everone,


I‘m relatvliy new to OpenFoam and I hope, anyone can help me.
I built a small river in Salome and the simulation of the water flow velocity in OpenFoam worked quite well (I used the interFoam-Solver). Now I want to put some individual particles into the running water and simulate their behavior in the river. The particles should differ in size and density, if possible.

Is there a solver I can use for my problem? I have looked through the OpenFoam User Guide and found these ones:
- icoUncoupledKinematicParcelFoam/icoUncoupledKinematicParcelDyMFoam

- uncoupledKinematicParcelFoam/uncoupledKinematicParcelDyMFoam

But I don‘t know, if they are usefull and the tutorials didn‘t helped me. Maybe one of you knows, which solver is the right for my problem.
In the first step it is also okay when the particles have the same size and densities. But if there is any option to use variable sizes and densities, that would be great.


Any help would be appreciable
Kind regards

[oswald]

Hi Sarah,


if you want to use a frozen flow field, then both solvers would in principle be appropriate. But there are some 'buts': These solvers are not able to handle VoF-flow out of the box. And I assume that you want to model the behaviour in actually running water? The solvers are also not capable of this. My suggestion would be to implement Lagrangian functionality to interFoam. You can have a look here: http://www.tfd.chalmers.se/~hani/kurser/OS_CFD_2019/lectureNotes/implementSolidParticlesInVOF.pdf



I would further suggest to integrate the basicKinematicCloud-class from the lagrangian/intermediate-library instead of the solidParticle-class, as this provides some more functionality that might be helpful for you (different forces, patch interaction models, injectionModels, ...).


Regarding size and density distributions: The injection models mentioned above are usually capable of using a size distribution or you can assign different diameters to different particles directly. You might also specify multiple injection models for different sizes. Densities are a bit more complicated as they are usually set to a constant value. But with a little bit of programming it is no problem to set the density to different values for different particles. At least in the "KinematicLookupTableInjection"-model, you can set different densities for different injectors.


Hope this helps for the beginning?

[phsieh2005]

Hi,


I tried to follow this paper: http://www.tfd.chalmers.se/~hani/kur...iclesInVOF.pdf. Although I was able to compile the modified interFoam solver, but, when I run the case, I did not see get lagrangian folder in the new time folder. I am wondering if there is any updated paper for either OpenFOAM v2206 or OF V10.


Thanks!


Pei-Ying

[ashrafh]

Hi,
I have a converged solution of wind over a cubic building, which was simulated using simpleFoam. I'd like to simulate the behavior sand particles via one way coupling. Which solver should I use to do this task?