CHARGE Solver Numerical Error convergence issue

- May 2, 2023 at 6:52 am
  
  krishnanunnira.20
  Subscriber
  
  I tried simulating a MQW structure by varying the thickness of the wells parabolically but the solver was throwing up "cant converge to a value, program terminated due to numerical failure". Please help me in solving this issue.
- May 2, 2023 at 5:06 pm
  
  Guilin Sun
  Ansys Employee
  
  This might be due to not suffiicently resolve the geometry, or mesh triangle quality is too high. This can happen when the device has thin and long layers or other small feature. You may try to increase the iteration limit, reduce the triangle quality. Please refer to this article for more details:
  https://optics.ansys.com/hc/en-us/articles/8355464963987-Troubleshooting-convergence-errors-in-CHARGE

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