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rakadit August 8, 2011 08:13

Control of volume fraction
 
Dear Friends,

I am modeling two phase flow using Eulerian model.The problem is that I am getting velocity of fluid even where volume fraction is zero.

for your kind information, I am using wall shear UDF in this simulation.
Please guide ,what can be reason for this and how to set velocity of fluid zero at the place where volume fraction is zero.

Thanks,

Rakesh

leflix August 13, 2011 13:18

Hi Rakesh,

Is the fluid phase supposed to be incompressible? If yes which velocity-pressure coupling algorithm do you use ?

rakadit August 19, 2011 00:52

Volume fraction
 
Dear Leflix,

Sorry for late response.

Thank you very much for your reply. yes, I am considering incompressible multiphase flow .I am using pressure based Fluent 6.3 Sover.

regards,

Rakesh

leflix August 19, 2011 05:15

Hi Rakesh,

first of all the volume fraction of a given cell can never be zero, since even in the case of very dense particle packing there is always small interstices of fluid.

do you know which velocity-pressure algorithm is used in Fluent to handle the volume-averaged Navier-Stokes and continuity equation?


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