[mayank.dce2k7]

Hi Foamers,

I am running particle simulation using OF 2.1.1 in triple bifurcation geometries. Until now I used to calculate steady flow field first by running simpleFoam on the geometry then picked the 'U' file from last time folder and placed in '0' folder of particle case and executed icoUncoupledKinematicParcelFoam to solve for particles.

Now I want to set up cases for one way coupled particle simulation with transient flow field. How can I give pre-defined velocity fields in this case?

Regards,
Mayank.

[haakon]

If you need to solve a transient particle-transport problem then you need to create your own solver for that purpose. For incompressible flow problems you can use pisoFoam as a basis for your solver, and then inspect the source code for the other Lagrangian solvers to find out what you need to add.

Even tough it is possible to pre-calculate a velocity field and use that with icoUncoupledKinematicParcelFoam, I really do not think that it is a good idea. Doing that require loads of storage and leads to large overheads with respect to I/O, not to mention that you loose the possibility of running coupled fluid-particle simulations.

[mayank.dce2k7]

Originally Posted by haakon

If you need to solve a transient particle-transport problem then you need to create your own solver for that purpose. For incompressible flow problems you can use pisoFoam as a basis for your solver, and then inspect the source code for the other Lagrangian solvers to find out what you need to add.

Even tough it is possible to pre-calculate a velocity field and use that with icoUncoupledKinematicParcelFoam, I really do not think that it is a good idea. Doing that require loads of storage and leads to large overheads with respect to I/O, not to mention that you loose the possibility of running coupled fluid-particle simulations.

Haakon,

I was also thinking the same regarding storage and overheads. Well, we already have solver available on the forum for calculating transient particle transport.

Regards,
Mayank.