无法解决的警告

- February 3, 2022 at 9:27 am
  
  1042255492
  Subscriber
  
  老师，我仿真时出现了警告，按照官网的解决方法，我知道是一个 dt 稳定性因子类型的发散。所以我调整了dt stability factor这个参数，从0.9一直到0.3，可是警告仍无法消除。我在确定发散类型后，就采用了原来的边界条件而非金属边界进行dt stability factor的调整测试。请问我这样的调整方法对吗？如果对的话，介于警告一直存在，请问老师怎样可以解决呢？
- February 3, 2022 at 4:35 pm
  
  Guilin Sun
  Ansys Employee
  
  如果用金属边界仿真结果仍然发散，一般不是dt factor 起不到什么作用。很可能是PML造成的，你试一下增加PML的距离和层数看看，如果有大角度光入射，可以选用Steep Angle PML 等。
  
  还有其它因素，请参考 Ansys Insight: FDTD 和 varFDTD 常见的发散原因以及处理

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