How to give Buoyancy and drag force for a particle in dpm
 

hi,
Iam using particle tracking to know how many particles are trapped. for this i have to give buoyancy and drag force for particle. But i cannot find these forces in fluent dpm. can any one tell me where can i activate these forces?

Regards,
Krishna.

Buoyancy is affected by the gravity and is included by default when gravity is enabled. The drag force law can be specified in the discrete phase model under injections.

Thank You for the reply.
These are the only forces I can activate in dpm.
Staffman lift force, Virtual mass force,Pressure gradient force. which one to choose?

Choose your drag law of the particles in DPM via: Discrete Phase Model > Injections... > injection-0 > Physical Models > Drag Law. Use Stokes-Cunningham for submicron particles, otherwise the spherical drag law (default) is probably appropriate.