viscosity limited
 

Hi i face whit 2meessages"turbulent viscosity limited to .." and reveres floe at ...on out flow" during solving a turbulant problem. i modeled 2 channel that cross eachother. i increase pressure under relaxation factor to 0.5 but i have convergnce problem whit qauntinuty equation. please help me. Whit king regards Rick

Re: viscosity limited
 

There are 3 reasons for this message: first the mesh quality is poor(skewness etc), second improper use of turbulent boundary conditions and the third one is the poor initial values for turbulent quantities, check for these things.

Re: viscosity limited
 

Dear Farhan my grid dosnt havy any problem . and what do you meam about use of turbulent boundary conditions? tankx alot Rick

Re: viscosity limited
 

It is turbulent intensity and length scale at the inlet boundary

Re: viscosity limited
 

yes, I think you have got the answer from Andrew