Some failures in the linearization of the solution

Geraud · September 18, 2012, 16:44

Hello everyone,

I have a simple question for you:

In the first iteration of few timesteps of my transient simulation, the solver fails to linearize the solution (Got some 'F'

for the momentum equations) but after the second iteration it does fine ('OK').

Is the first iteration of a timestep has any impact on the result written for the current timestep? Can I still trust the result of those specific timesteps?

Thanks,
Geraud.

ghorrocks · September 18, 2012, 19:32

It is the final convergence which is important. So if comes good by the end of the time step then you are OK.

Geraud · September 19, 2012, 13:11

Good news!

Thanks,
Geraud.

September 18, 2012, 16:44	Some failures in the linearization of the solution	#1
Geraud New Member Join Date: Jun 2012 Posts: 9 Rep Power: 13	Hello everyone, I have a simple question for you: In the first iteration of few timesteps of my transient simulation, the solver fails to linearize the solution (Got some 'F' for the momentum equations) but after the second iteration it does fine ('OK'). Is the first iteration of a timestep has any impact on the result written for the current timestep? Can I still trust the result of those specific timesteps? Thanks, Geraud.

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September 18, 2012, 19:32		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	It is the final convergence which is important. So if comes good by the end of the time step then you are OK.

September 19, 2012, 13:11		#3
Geraud New Member Join Date: Jun 2012 Posts: 9 Rep Power: 13	Good news! Thanks, Geraud.