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underworldcode / underworld2

underworld2: A parallel, particle-in-cell, finite element code for Geodynamics.
http://www.underworldcode.org/
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Converging issue for 3D subduction model with oblique trench shape. #692

Closed Peigen-L closed 5 months ago

Peigen-L commented 5 months ago

Hi, teams

I am testing the subduction with the oblique trench using Underworld 2.14b. Here is the test 3D model I create for the oblique subduction: https://github.com/underworld-community/Peigen-HPC/blob/main/Oblique_128.py

I run the model under resolution 128x48x48. The low res model would not converge after 50 iterations after time-step > 40.

Then I upgrade the model by increasing the resolution. The high-resolution model, 258x96x96, would run as normal (converged after 2 iterations).

However, I still want to test the low resolution model first.

I wonder why the low-res model doesn't converge like the high-res model?

Peigen-L commented 5 months ago

Closing the issue. The high-res is mandatory to produce the correct model results.