|July 22, 2006, 03:56||
Hello! Im trying to model a
Im trying to model a an airflow in a channel with Re = 55000. Im not sure which turbmodel to use for this but most of the models that i have tried have ended up with results looking too laminar compared with experimental values. I might be calculating the k and epsilon BC/IC values wrongly.
The way i try to calculate them is:
k = 0,002*Ub*pow(2)
epsilon = k*pow(3/2)/(0,3*Dh)
where Ub is bulkvelocity and Dh is the hydralic diameter.
So far i have treated the flow as higher turbulent and used wallFunctions with zeroGradient on k.
Does anyone have a suggestion for me what to do to make my flow look more turbulent?
This image illustates my flow profile. the upper patch is a wall and the three others are symmetryplanes. According to the experemental data the magnetude of U should not be higher then 25.2 m/s.
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