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

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

Scheduled Pinned Locked Moved Fluent
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  • C Offline
    C Offline
    cultivate
    wrote on last edited by
    #1

    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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  • S Offline
    S Offline
    syn
    wrote on last edited by
    #2

    您好,请问您发散的问题解决了吗,我现在也遇到了相似的问题。就是PBM模型里面的相间作用力我只能考虑曳力,添加其他作用力就会发散,卡了好久了。

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