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Forum: OpenFOAM Running, Solving & CFD

June 19, 2012, 03:05

Replies: 5

Particle Reynolds number calculation in Lagrangian tracking?

Views: 5,990

Posted By jiejie

I think I found the answer: F = Sp(U - Up) + Su ...

I think I found the answer: F = Sp(U - Up) + Su

When they evaluate the force with the value.Sp, it is multiplied by (U_c-U_p), hence, there should not be a negative sign in the front.

Jie

Forum: OpenFOAM Running, Solving & CFD

June 19, 2012, 02:50

Replies: 5

Particle Reynolds number calculation in Lagrangian tracking?

Views: 5,990

Posted By jiejie

Hi niklas Thanks for the quick reply.This...

Hi niklas

Thanks for the quick reply.This means the U_rel is defined as "U_p - U_c". The drag force is defined as

F_d = 0.5*Cd*rho_c*A_p*|U_c-U_p|*(U_c-U_p).

If OpenFOAM uses the U_rel =...

Forum: OpenFOAM Running, Solving & CFD

June 19, 2012, 02:21

Replies: 5

Particle Reynolds number calculation in Lagrangian tracking?

Views: 5,990

Posted By jiejie

Particle Reynolds number calculation in Lagrangian tracking?

Dear foamers

I am trying to implement the Srudhar and Katz bubble motion equation in the OpenFOAM. Hence, I looked at the exisiting Sphere Drag force model. I found there might be a possible...

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