[enoch]

I wanted to look at particles' tracking using icoUncoupledKinematicParcelFoam.
SaffmanMeiLiftForce was added in kinematicCloudProperties, but I think the lift dictionary was not correctly given. How can I make it work?

[wyldckat]

Greetings Jeongho,

I hope you don't mind, I'll quote from the private message you sent me, to add some more details to this question:

Originally Posted by enoch

It seems that the bug on lift force is fixed, but I could not make it. I wanted to look at particles' tracking using icoUncoupledKinematicParcelFoam. SaffmanMeiLiftForce was added in kinematicCloudProperties. When I run icoUncoupledKinematicParcelFoam, the solver stops running. I think the lift dictionary was not correctly given. How can I make it work?

kinematicCloudProperties
..
subModels
{
     particleForces
     {
           sphereDrag;
           gravity;
           SaffmanMeiLiftForce;
     }
...

And as you mentioned in the private message, it's explained on this post how to use "SaffmanMeiLiftForce": http://www.cfd-online.com/Forums/ope...tml#post512967 - post #9

OK, the first detail is that the bug is already fixed in OpenFOAM 2.3.1 and 2.3.x. And according to the log file, you're using 2.3.1, therefore the bug is fixed.

As for how to use "SaffmanMeiLiftForce", you will really need to study the post I mentioned: http://www.cfd-online.com/Forums/ope...tml#post512967 - post #9
Because there are at least 2 details you need, where the first one is that you are not using it correctly:

      particleForces
     {
           sphereDrag;
           gravity;
           SaffmanMeiLiftForce;
     }

you should instead use something like this:

    particleForces
    {
        sphereDrag;
        gravity;
        SaffmanMeiLiftForce
        {
            U U.air;
        }
    }

For the second detail, you'll have to read/study the other post

Best regards,
Bruno

[AJAY BHANDARI]

Hi all,

I think my post best fits here. I want to do particle tracking in a porous media.

Basically i want to couple the lagrangian particle tracking with the eulerian model according to the case which i have solved.

I have started with lagrangian (solid particle) and coupled it with my eulerian solver.

Now the problem is that there are only drag force, gravity and byoyancy force which are included in the lagrangian (solid particle) solver. I want to add two new forces in this
namely vander wall force and brownian motion force.

Can somebody tell the procedure or any tutorial how to add a new force in particle tracking algorithm available in openFoam 2.4.0

Or an other particle tracking algorithm available in openFoam2.4.0 which takes care of these two forces also.

Regards
Ajay

[Nigel Bruce Khan]

hello, Ajay. I am doing something similar and I want to know if you figured out how to add van der wall force to your model. If yes could you please help me. Thank you.