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Txema February 20, 2007 04:02

simulation of centrifugal impeller
 
I'm simulating a centrifugal impeller. I put:
*Inlet = mass flow inelet
*Outlet= outlet pressure
*air with constant density
After 150 iterations the simulation starts to become instable.
How can I improve convergence??
Txema

Hossein February 23, 2007 02:08

Re: simulation of centrifugal impeller
 
Hi! I think you must reduce under relaxation factor of Turb. kinetic energy and Turb. dissipation energy to 0.6 and use second order upwind method for momentum,Turb. kinetic energy and Turb. dissipation energy...it's better to use velocity-inlet B.C. instead of mass flow inlet B.C.



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