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-   -   Drag Force - newbie! (http://www.cfd-online.com/Forums/star-ccm/97608-drag-force-newbie.html)

bioflow February 21, 2012 09:40

Drag Force - newbie!
 
Looking for advice on what drag force constant to use for a multiphase flow (particle in water)

Also keep getting divergence instead of convergence, looking for any possible advice?

ryancoe February 23, 2012 18:51

Can you elaborate a little? What do you mean by a drag force constant?

Divergence of a solution can occur for a wide range of reasons. A good place to start would be your temporal and spacial discretizations (i.e. your time step and your mesh size) of your simulation.

bioflow February 24, 2012 06:16

Sorry, I should have been more specific!

I'm running multiphase segregated flow, with two Eulerian phases - water, and a suspended particle. I'm wondering what drag force co-efficient to use for the phase interaction? Re = 800.


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