消声器仿真求解不收敛

蟑螂先生

要研究研究

longyh

求助：消声器计算出现这个，怎么解决呢？
C:\未命名.bmp

会不会跟我离散时候出现这个警告有关啊
The discretization lengths for shell(muffle-shell) are:
      In X direction: 50.00 mm
      In Y direction: 50.00 mm
      In Z direction: 45.00 mm
      Accept   Ratio: 50.0
The flowsplit with biggest volume is muffle-shell_6_1_4, volume is 198000 mm^3
The flowsplit with smallest volume is Inlet10, volume is 6637 mm^3
Warning: The smallest volume is less than 40000 mm^3
The flowsplit with the second smallest volume is Inlet9, volume is 6637 mm^3
Warning: The biggest volume / smallest volume = 29.84

那一般穿孔管用多长离散比较合适呢？怎么我总是会出现警告啊
急求指教！