Is this mesh consider a good mesh???

http://www.imageno.com/r0ke36nqeccwpic.html

I read this msh file in fluent and when i start to iterate with k-w models. A message "turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 191 cells"

I know the problem has something to do with my mesh. How to know where do the cells jump occur? How to check?

Waiting for reply

sounds good enough mesh to me,

intiate with k = 0.0001 and omega = 10

and you will not see that warning if the mesh is okey.

What does the K and omega means?

turbulence model's k and w.

You were using k-w model, remember.

I know that's k-w turbulent model.

But I wish to know the meaning if possible. usually i set w and w =1 which are by default

Do I still need to use k-w model even the Re is below 5 X 10^5?

Do I still need to use k-w model even the Re is below 5 X 10^5?

using or not using turbulence model is what you got to decide. I think in your situtation i would be using turbulence model. SST KW is good choice generally.

What i suggested you was that default initialization could start this warning, but if you initialize differently and if solve convergence you will not see this warning. I usuallyt initialize with these values and have not got this warning.

I am not able devlop geomitry for mixed flow pump since it is too complex. what approach should i adopt.can i get cad geomitry or msh file for waterjet propulsion or at least mixed flow pump

Hi pukiwawa,

You can try smooth/swap options to increase the mesh quality. Increase the number of iterations to smooth the mesh.