What solver convergence looks like

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A system is converged when the residuals are close to 0 within a tolerance. How this is achieved depends on what solver you use, but generally you want your residuals to decrease as computationally quickly as possible.

0:00 - Intro
1:00 - The basic idea of convergence
2:36 - How to tell when a system is converged
6:54 - Convergence in the terminal
13:25 - Conclusion

Relevant OpenMDAO doc pages:

  1. OpenMDAO
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Thank you for this lecture. If we have a cycle in the MDA then do we add nonlinear solver for eeach of the cycle or just once in the problem.model?

kapilkhanal