Pb in conv. ke 3D Help
Hello,
I am running a 3d simulation using the standard KE model. after 10 iterations "sliding mesh simulation" (in steady state flow) values of k & epsilon are diverging. I have the message: "Turbulent viscosity limited to viscosity ratio of 1e5 in cells". I used pressure based solver. Can anyone help with this please? Thanks. 
mesh
pl. check mesh quality.:)

I do gridcheck, everything is good!

and if I make simulation in laminar flow, solution converge!

Try with very small underrelaxation numbers and gradually increase them to default values. That might help.

Hi Tez,
I divided UR factors by 100, results are better . but there are fluctuations of the epsilon parameter. After 100 iterations the residuals of k and e parameters are about 5.e2. tell me plz. how to increase gradually these parameters? by stopping and restart calculation and increasing URP without initializing? 
hello
I think it is better to give a inviscid solution and then set it as a intial condition for turbulent solution.another way is to set the "turbulent insity" and "turbulent viscousity ratio" to 1 at velocity inlet.

Hi greeneye,
I apply your second proposition but k & epsilon residuals remind at too high values (about 1.e1). I have a simple question for you: how to use a solution as an initial condition in Fluent? by iterating without initilize solution? thanks 
All times are GMT 4. The time now is 23:37. 