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Diefference between tolerance and residual control

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Old   March 30, 2015, 11:47
Default Diefference between tolerance and residual control
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ASo
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Hi all,

I'm looking for details about the convergence criteria for the simpleFoam solver.
This document explains the simpleFoam solver : https://openfoamwiki.net/index.php/O...hm_in_OpenFOAM
As far as I understand : the "tolerance" and "reltol" parameters define when the algorithm stops to go to the next time step.

Am I wright about this ??

I've read that residual controls (set for each field) act on initial residual.
I don't realy understand what are the initial residual.

Thx for answer
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Old   April 9, 2015, 06:27
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ASo
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Hi all,

No one knows about the initial residuals ? Or could give me documentation about it ?

Sorry for my bad English I'm french !!

Thanks for answers.
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Old   April 9, 2015, 06:47
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Alexey Matveichev
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Hi,

In fact forum has search functionality:

http://www.cfd-online.com/Forums/ope...d-solvers.html
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residalcontrol, simplefoam convergence, tolerances

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