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    cfd-pbm模拟油水两相分散:计算中出现Divergence in Luo Breakup kernel

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      cultivate last edited by

      连续相:水;分散相:硅油(αd=0.01v%)。油在水中分散。速度进口,压力出口。湍流模型选SST K-w。用PBM模拟液滴直径分布。
      Fluent的Mesh Quality:(网格质量)

      Minimum Orthogonal Quality = 4.58757e-01 cell 63512 on zone 14 (ID: 119996 on partition: 0) at location (-1.46837e-03 -3.11654e-04 2.62275e-01)
      (To improve Orthogonal quality , use "Inverse Orthogonal Quality" in Fluent Meshing,
      where Inverse Orthogonal Quality = 1 - Orthogonal Quality)

      Maximum Aspect Ratio = 3.17826e+01 cell 63834 on zone 14 (ID: 881495 on partition: 12) at location ( 3.37841e-05 -1.15102e-02 2.24530e-01)

      PBM设置如下:离散法求解,7个bins,比例指数为2.4,给定的最小分散相粒径为0.4mm,破碎和聚并和均为luo模型。
      12.png
      Bin Sizes for oil (7) :-
      Bin Number Bin Size (mm)

      Bin-0 11.143047
      Bin-1 6.4
      Bin-2 3.6758347
      Bin-3 2.1112127
      Bin-4 1.2125733
      Bin-5 0.69644045
      Bin-6 0.4

      计算过程中发散,提示如下:
      Error at Node 14:

      Divergence in Luo Breakup kernel.
      Please stop iterating and check solution - parent dia = 1.114305e-02, daughter dia = 3.258247e-03!!

      有路过的大佬帮忙看看不?卡了好久,不知怎么解决?提前谢谢了~

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