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关于气固三相流的旁路结构残差下溢问题

  • K

    如题，是关于气固固三相流的一个案例，之前的反应器是圆柱形直管，没问题；之后在侧面开口干路通气体及固体A旁路通气体及固体B，出现速度残差下溢问题，问题就出在旁路这个小管子上，修改网格修改边界条件都没有效果，各位大神有没有也遇到过这样的情况？
    附几何模型84088caf-a242-4d21-a6fb-ce0dfc0fa764-image.png
    附残差图case1.1trans.jpg
    及附错误代码

    error:floating point exception

Flow time = 0.00217s, time step = 217
999783 more time steps

Updating solution at time level N... done.

  iter  continuity       u-air      u-cold       u-hot       v-air      v-cold       v-hot       w-air      w-cold       w-hot     gt-cold      gt-hot     vf-cold      vf-hot     time/iter
!  824 solution is converged
   824  4.4734e-05  4.3028e-06  1.6160e-15  1.5532e-16  3.7044e-06  8.4128e-16  1.8434e-17  2.6324e-06  9.2002e-16  2.2426e-17  4.2387e-04  7.7097e-04  1.3462e-05  3.1041e-05  0:06:39  200
        Stabilizing mp-x-momentum to enhance linear solver robustness.
        Stabilizing mp-y-momentum to enhance linear solver robustness.
        Stabilizing mp-z-momentum to enhance linear solver robustness.
        Stabilizing pressure correction to enhance linear solver robustness.

Divergence detected in AMG solver: pressure correction        Stabilizing granular-temperature to enhance linear solver robustness.

Divergence detected in AMG solver: granular-temperature        Stabilizing granular-temperature to enhance linear solver robustness.

Divergence detected in AMG solver: granular-temperature        Stabilizing vof-1 to enhance linear solver robustness.

Divergence detected in AMG solver: vof-1        Stabilizing vof-2 to enhance linear solver robustness.

Divergence detected in AMG solver: vof-2
Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: granular-temperature
Divergence detected in AMG solver: granular-temperature
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: vof-2
Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: granular-temperature
Divergence detected in AMG solver: granular-temperature
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: vof-2
Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: granular-temperature
Divergence detected in AMG solver: granular-temperature
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: vof-2
Error at host: floating point exception

Error at Node 1: floating point exception

Error at Node 0: floating point exception

Error at Node 2: floating point exception

Error at Node 3: floating point exception

Error: floating point exception
Error Object: #f
  • zhijie

    在600步的时候，这个时候好像发散了，你看是不是有一个残差直接消失不出现了。你这种问题可能是边界设置有问题，检查一下边界条件是否合理。 :chouchou:

    K 1 Reply
  • K

    @zhijie 谢谢您的建议，600步之前是稳态计算，600步之后是瞬态计算，边界条件我一直在做修改尝试，目前还没解决，谢谢您:xinxin3:

  • zhijie

    我在做多相流稳态计算的时候，vf-vapor项残差突然变为0，然后后面就跟你这个一样了，其他残差直线下降。但是结果还是错的，温度场不符合常理。后来我检查发现边界设置错了:xinlei:

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