Elmer Discussion Forum

Thanks for your help!
Roland

Hi,
Thank you Kevin for your answer.
But then what happens if you give no reference norm for a solver? Will the TEST.PASSED file then automatically be filled with a 0 ?
Thanks in advance for your help.
Roland

Hi, In many Elmer examples I see that often a "Reference Norm" is used for a given solver in the sif file. So my question is: How must this "Reference Norm" instruction be used, meaning how is it possible to know the correct norm of a variable before having solved the sif file? T...

Hi Kevin,
Thanks again for your valuables efforts!
Yes, what you say with words is exactly what I would translate in pseudo-code!
Do you think that it would possible? Perhaps Peter could also give his opinion.
We keep us informed.
Thanks again!
Roland

Hi, It is a bit difficult to really understand how all the convergence tolerances interact during the solve only in sentences, Kevin. I saw the ElmerSolverManual's 1.2 part (Handling interactions of multiple physical phenomena) which shows the pseudo-code of the handling of a multiphysics equation s...

Hi,
Thanks a lot Kevin for your detailed explanation which I will read and come again to you if I have some more points to clear.
Roland

Hi, Having no answer about my former post I will try to ask the things on a more simple way: In a non linear multiphysics coupled model I would like to better understand how the nonlinear convergence tolerance and the steady_state convergence tolerance interact when the solver works. Can this be exp...

...Sorry, my former post has been interrupted. I continue it here after: I am still trying to better understand how all the linear, nonlinear, steady_state convergence tolerances interact in a time dependant nonlinear multiphysics coupled problem. In the Elmer solver manual a pseudo-code describes t...

Hi Peter, After thinking this "Steady state convergence tolerance" matter a bit more and after reading one of your former post explaining the 3 convergence nested levels (liner, nonlinear and loosely coupled equations system) I think I understand now what is the "Steady state": w...

Hi Peter, Thanks for your answer. But I still don't feel exactly what this convergence criterion (which I understand for non-linear and linear iterations when using a solver) is for " steady state ". What do you mean exactly by "Steady state" ? What confuses me is that you refer ...