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-   -   Volume fractions in muliphase model (http://www.cfd-online.com/Forums/fluent/49980-volume-fractions-muliphase-model.html)

mange December 5, 2008 05:36

Volume fractions in muliphase model
 
Hi,

I am doing a simulation of cavitating flow. I use the pressure based, mixture model with the implemented cavitation model (really just one option of solver if using the cavitation model).

The problem thus contains 1.mixture level 2.water (also some non condensable gases defined in the cavitation model) 3.vapor

Now i want to implement a UDF for defining my own BC.

For this i need the speed of sound of the mixture. i could not access this variable in my UDF C_C2(c,t_mixture) gives the value 0. Anyone has experience with this?

to work around this i need to calculate the speed of sound myself. But for this i need each phase volume fraction. Now, i tried C_VOF(c,t_phase_i) does not give the volume fractions. Does anyone have some advice on how to access them?

all suggestions and thoughts are welcome :D


asifnazir August 31, 2009 07:58

i have also same kind of problem if u have find the solution then plz also inform me about it.specially the problem of finding the volume fraction


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