How to define the size of particle in Eulerian
 

Hi,
I simulate the particle behavior in a room. I want to use Eulerian multiphase to simulate the particles. But, I do not know how to define/cahnge the particle size.
Anyone knows?

I assume, you specified your dispersed phase as particle phase? So you can enter the diameter of the particles in the "Multiphase Interaction" node in the physics continuum.

Please note, this diameter will not be taken into account for the drag force. To model the drag force, you need to specify the drag coefficient. This might be confusing, but that's because the particles don't need to be spheres, therefore the drag law might be entered according to the expected behaviour.

How to simulate eulerian multiphase to simulate the particle
 

Dear Siara

Hi, I simulate the particle in a ventilated room, too. However, there is no tutorial in star-ccm+ for eulerian method about particle. The star-ccm+ has three eulerian multiphase model(Eulerian Multiphase Mixture, Multiphase Segregated Flow, Volume of Fluid (VOF)) and can i ask the physics model which is proper to simulate indoor particle. Thank you.

Hello everyone!

Dear abdul099, in 2019 starccm+ I cannot find such an option. I can't find anywhere how to change that particle (or droplet in the fluid case) size unless I add a particle size distribution model to my dispersed phase which I don't intend to use.

Any orientation on this matter will be most hepful.

Thanks!
Cheers.