Newton solver does not converge

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mazdak atri

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Sep 23, 2022, 6:52:39 AM9/23/22

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Dear all

I am trying to solve a consolidation ( linear, coupled, and time-dependent) problem which I solved before with the linear solver. The reason for it is that I need to solve more complicated nonlinear coupled problems. However, I cannot realize what is the issue with my code that it is not working and I am getting the error as:

*** Error: Unable to solve nonlinear system with NewtonSolver.

*** Reason: Newton solver did not converge because maximum number of iterations reached.

*** Where: This error was encountered inside NewtonSolver.cpp.

*** Process: 0 *** *** DOLFIN version: 2019.2.0.dev0 *** Git changeset: 74a6ac2095059ea6582fe4ea11686c1c723e14f5

Please find the colab link of my code https://colab.research.google.com/drive/1EDD6V9-g0YxwnMnOUjUTN0oUcWIrmofX#scrollTo=bGvuOUy4lj6d&uniqifier=2

I appreciate any help in solving my problem.

Kind regards,

Mazdak Atri

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