This is common. Please refer to this article: Troubleshooting convergence errors in CHARGE – Ansys Optics
Please consider the following suggestions in addtion to the article:
1: using local mesh constraint for the thin layer
2: using larger min and max edge lengths in general
3: reduce the sensitivity
4: in advanced options, increase the max plc edge length except the thin layer is thinner than 10nm.
5: increase the iteration limits.
6: please check if any material used has large bandgap, which can lead to huge difficulty for concerging.
Please also refer to
Quality mesh constraint (Finite element) - Simulation object – Ansys Optics
Mesh constraint (Finite element) - Simulation object – Ansys Optics
Lastly, please write post in Photonics forum later: Photonics (ansys.com)
Please Login to Report Topic
Please Login to Share Feed