[weihong]

Dear all, I am a beginner with ANSYS Fluent and multiphase modelling. I encountered a problem while defining the problem using Multifluid Eulerian model, I must set the secondary phase as fluid as mentioned in the tutorial.

"For a granular phase (which must be placed in the fluid materials category, as mentioned in Steps for Using a Multiphase Model), you need to specify only the density; you can ignore the values for the other properties, since they will not be used."

However, when I define the secondary phase as fluid, I am unable to set the appropriate drag force model because it is treated as fluid-fluid instead of fluid-solid, i.e. drag models of Syamlal-O’Brien, Gidaspow, Wen-Yu does not show up.

This definitely seems contradictory to me so I’m not sure if I missed out anything in the procedure. Thanks all for your time!

[bhargavbharathan]

Hello,

Did you try assigning the secondary phase as "granular" under phases->secondary phase. This should open up the drag law options you are looking for.

-BB