ansys 中fluent采用DDPM模拟流化床气固流动，追踪颗粒运动

siyuan315

如题，有人做过dense discrete phase model 模拟气固流化床的流动吗？
我用ansys 12 做了但还总是出问题 设置同双流体欧拉的算法一样，只是这个 欧拉相 为 空气，离散相为固体颗粒 共计两种，小颗粒选择首先填充在二维床，空隙率为 0.5， 大颗粒在0.5秒后射入，计算到1.29s后，大颗粒已在1.2s停止射入了，出现问题如下：请高手指点
  iter continuity      u-air     u-coke      v-air     v-coke      k-air    eps-air    vf-coke     time/iter

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 3 cells
44213 1.0746e+01 1.7941e-01 2.6889e-01 2.1741e-01 2.0695e-01 1.2678e+00 3.2335e+00 1.8352e-03  0:00:03    7

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 3 cells
44214 4.8197e+01 1.3763e-01 5.2288e-02 1.3817e-01 1.0736e-01 8.2514e-01 1.1081e+00 2.5396e-03  0:00:03    6
44215 8.3652e+03 7.5059e-01 2.0728e-01 2.8060e-01 5.4773e-02 6.0720e-01 9.0233e-01 8.4961e-02  0:00:02    5
44216 1.1859e+04 3.8404e-01 2.4719e+00 5.8402e-01 2.6957e-01 2.2921e+02 2.6438e+05 6.3061e-02  0:00:02    4
44217 6.5521e+04 1.1506e+00 6.9253e-01 1.2598e+00 9.8358e-01 2.3582e+01 5.8785e+02 7.0267e-02  0:00:01    3
44218 2.4151e+05 1.8887e-01 2.9477e-01 2.7493e-01 4.8152e-01 4.5681e-01 8.7260e-01 6.2989e-02  0:00:01    2
44219 1.4168e+10 6.2131e-01 2.5208e+00 5.8900e-01 1.1035e+00 3.6734e-01 5.6704e-01 1.3874e-01  0:00:00    1

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 123 cells

Error: floating point exception
Error Object: #f

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 8 cells

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 167 cells

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 84 cells

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 1409 cells

reversed flow in 30 faces on pressure-outlet 4.
# Divergence detected in AMG solver: mp-x-momentum -> Decreasing coarsening group size!
# Divergence detected in AMG solver: mp-x-momentum -> Increasing relaxation sweeps!
# Divergence detected in AMG solver: pressure correction -> Turning off correction scaling!
# Divergence detected in AMG solver: pressure correction -> Increasing relaxation sweeps!

Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: k
Divergence detected in AMG solver: epsilon
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: k
Divergence detected in AMG solver: epsilon

李名

我也遇到了这样的问题，请问怎么解决

siyuan315

没有解决啊，放弃了，估计是本身设置参数的问题

Kedan

有人能解决吗？我也遇到了这样的问题

myselfly

问题解决了吗，我也碰到了同样的问题，不知道怎么办？

lucklhz

楼主最后怎么解决这个问题的？

upjzk

能补能有高手专门介绍一下DDPM模型呀~~~？？？

france

修改里面说的发散的相关参数。我遇到了一个类似的问题# Divergence detected in AMG solver: epsilon -> Increasing relaxation sweeps!，我修改了标准k-ε中的C1和C2值之后就可以计算了