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-   -   Centripetal forces on particles in incompressible fluid (http://www.cfd-online.com/Forums/openfoam-solving/110533-centripetal-forces-particles-incompressible-fluid.html)

sam1984_b December 13, 2012 11:15

Centripetal forces on particles in incompressible fluid
 
Hi all,

I am trying to simulate very small oil droplets in water, in a rotating reference frame. I would like to use icoUncoupledKinematicParcelFoam, as the problem is an incompressible one and I would like to uncouple the particles from the flow. However, I am struggling to implement the centripetal/Coriolis forces on the particle.

As far as I can see, my options for particle forces include NonInertialFrame and SRF, neither of which seem to work.

When I put in a NonInertialFrame in the kinematicCloudProperties, as

particleForces
{ nonInertialFrame
{omega (0 0 180);
centreOfRotation (0 0 0);
}}


It compiles and runs but the particles stay perfectly still! It's always worrying when I can replace that code with nonInertialFrame {blah blah;} and get the same result.

When I try and use SRF I get the error message:
request for SRFModel SRFProperties from objectRegistry region0 failed
available objects of type SRFModel are 0 ( )

So I guess the solver doesn't know to supply the SRF data. Please could someone advise, I would be happy fixing either of the above, or putting in a custom code to define the particle forces.

Thanks in advance,

Sam


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