It might seem quite obvious for many but I could not find a clear explanation anywhere (Elmer Solvers Manual p.8 there is smth). Therefore, I decided to share my understanding on the Word file attached. Please correct me if I am wrong and I hope it helps.
It is for a model with 2 solvers coupled (LinearElastic + Reynolds):
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Equation 1 :: Active Solvers (1) = 1
Equation 2 :: Active Solvers (1) = 2
1. Different levels of Coupling Systems. Is there any difference between:
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Equation 1 :: Active Solvers (1) = 1
Equation 2 :: Active Solvers (1) = 2
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Equation 1 :: Active Solvers (2) = 1 2
2. I noticed that the command "Linear System Abort Not Converged = Logical True/False" somes times does not work. So you need to check if the results are convergent manually.
RELC = relative change? I use this one.
NRM = ?
How do you do it?
It would be great to print a message at the end of the simulation with Convergence Yes/No.