Error: Divergence detected in AMG solver: x-momentum

lucabiagioni · October 1, 2013, 11:46

I am doing a 2D wind simulation in an urban area for a small wind turbine. When I start the calculation it gives me this error!

Divergence detected in AMG solver: x-momentum -> Increasing relaxation sweeps!

Error: Divergence detected in AMG solver: x-momentum
Error Object: #f

Please help me!!!

Thanks,

Luca.

A CFD free user · October 1, 2013, 15:31

Hey!
With a hundred percent you forgot something, maybe appropriate values for initialization or wrong B.C. Check it.

chngyian · October 2, 2013, 12:30

Quote:

Originally Posted by A CFD free user

Hey!
With a hundred percent you forgot something, maybe appropriate values for initialization or wrong B.C. Check it.

yup, this is possible. i got this error when using 300k instead of 350k for initialization.

lucabiagioni · October 4, 2013, 14:02

And now, this error?!

Cell Centroid is xc 119.995003 yc 0.368473
WARNING: no face with given nodes. Thread 10, cell 94826
Clearing partially read grid.

Error: Build Grid: Aborted due to critical error.
Error Object: #f

October 1, 2013, 11:46	Error: Divergence detected in AMG solver: x-momentum	#1
lucabiagioni New Member Join Date: Oct 2013 Posts: 5 Rep Power: 13	I am doing a 2D wind simulation in an urban area for a small wind turbine. When I start the calculation it gives me this error! Divergence detected in AMG solver: x-momentum -> Increasing relaxation sweeps! Error: Divergence detected in AMG solver: x-momentum Error Object: #f Please help me!!! Thanks, Luca.

October 1, 2013, 15:31		#2
A CFD free user Senior Member A-A Azarafza Join Date: Jan 2013 Posts: 226 Rep Power: 14	Hey! With a hundred percent you forgot something, maybe appropriate values for initialization or wrong B.C. Check it. __________________ Regard yours

October 4, 2013, 14:02	???	#4
lucabiagioni New Member Join Date: Oct 2013 Posts: 5 Rep Power: 13	And now, this error?! Cell Centroid is xc 119.995003 yc 0.368473 WARNING: no face with given nodes. Thread 10, cell 94826 Clearing partially read grid. Error: Build Grid: Aborted due to critical error. Error Object: #f

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