Hi experts,

I am using Fluent 16 and Gambit. While using powerful Xeon processor and parallel processing with 20 processors, one time step is completing in 18 seconds. I need to complete 10,000,000 time steps(step size is 1e-5). Maximum number of iteration per time step is 50. So, total computation time would be 1851 days, which is NOT acceptable. I am applying Two phase flow Eulerian-Eulerian , PBM, Turbulence Models.

** If I will minimize the Max. No. of iterations 50 to 20 and increase the step size to 1e-4 or 1e-3 it would create divergence and instability. (Still I am facing poor convergence for continuity , epsilon and K ..)

But some experts suggest me the above** may be possible if your mesh quality is good. So I am looking forward to your expert opinion how to improve the mesh quality ? what are the parameters should I check to improve quality ? How these parameter can be changed while using Gambit and Fluent 16.

current mesh size and quality is :

(

Mesh Quality:

Minimum Orthogonal Quality = 9.88147e-01

(Orthogonal Quality ranges from 0 to 1, where values close to 0 correspond to low quality.)

Maximum Ortho Skew = 1.18533e-02

(Ortho Skew ranges from 0 to 1, where values close to 1 correspond to low quality.)

Maximum Aspect Ratio = 1.54000e+01

Mesh Size

Level   Cells       Faces       Nodes      Partitions

0          36010    112937     41059      4

1 cell zone, 4 face zones.

Any suggestion would be appreciated !!

Regards 

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