Learning Forum

[gagan6644]

Hello

I am simulating Cooling fan module which is placed in a rectangular pipe, I have a problem with convergence, I ran 5000 iterations but still, the solution isn't convergence, any suggestion to solve this Issue 

Steady state -MRF Method 

K omega SST turbulence model 

boundary conditions- 0 pa inlet and 0pa outlet pressure     mesh : 4.4 million cells

 

[Karthik Remella]

Hello,

Can you create a monitor (say avg. velocity at the outlet or avg. velocity at the inlet) and see if you are reaching a steady solution?

Also, please take a look at your mass flux reports. Is the net value small compared to the mass flux crossing the inlet / outlet boundaries?

Thanks.

Karthik

[gagan6644]

hi kremella, thank you for reply , 

will check them, 

I have a question regarding setup, instead of creating many solid-fluid interfaces, I just made boolean operation and removed stator(solid) or shroud from the enclosure. so do you think it might affect convergence?

B.R

Gagan

[Rob]

Shouldn't make much difference other than to the solve speed. Put the monitors in as Karthik suggests as I suspect you've got some transients in the flow.