求助：我的FLUENT出现了这样的提示

zlx198200

所有设置好后，我的FLUENT出现这样的提示：
  turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 96152 cells
我设置了好几次，还是这样的提示，实在不知道是什么具体的错误，该如何解决？
带着错误我计算了几步，结果出现如下：

  iter continuity x-velocity y-velocity z-velocity     energy          k    epsilon  vf-liquid     time/iter
   turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 60784 cells
     1 1.0000e+00 0.0000e+00 6.1059e+03 0.0000e+00 3.2114e-08 3.4881e-03 5.7730e+00 0.0000e+00  0:06:36   99

reversed flow in 21 faces on pressure-outlet 5.

reversed flow in 20 faces on pressure-inlet 6.
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 15843 cells
     2 1.0000e+00 1.9396e-01 5.1677e-01 1.2754e-01 6.8368e-08 4.8943e+00 4.3217e+03 0.0000e+00  0:06:32   98

reversed flow in 35 faces on pressure-outlet 5.

reversed flow in 3 faces on pressure-inlet 6.
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 11813 cells
     3 1.0000e+00 9.2225e-02 2.1099e-01 7.5034e-02 1.0134e-07 5.8322e-01 8.9735e+00 0.0000e+00  0:06:28   97

reversed flow in 43 faces on pressure-outlet 5.

reversed flow in 7 faces on pressure-inlet 6.
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 9723 cells
     4 1.0000e+00 7.8878e-02 1.7933e-01 6.8879e-02 2.6122e-07 6.2951e-01 4.3916e+00 0.0000e+00  0:06:05   96

reversed flow in 9 faces on pressure-outlet 5.

reversed flow in 15 faces on pressure-inlet 6.
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 2628 cells
     5 1.0000e+00 6.5449e-01 1.6122e+00 2.4551e-01 1.2610e-07 4.7614e+04 2.7733e+07 0.0000e+00  0:05:46   95

reversed flow in 39 faces on pressure-inlet 6.
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 5440 cells
     6 2.8752e+00 3.7018e-01 6.7649e-01 2.7863e-01 7.1929e-08 7.8584e-01 5.1276e+00 0.0000e+00  0:05:30   94

reversed flow in 44 faces on pressure-outlet 5.

reversed flow in 9 faces on pressure-inlet 6.
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 86014 cells
     7 9.3981e+01 1.7845e-01 6.6302e-01 3.3312e-01 4.2719e-07 2.8447e+01 2.5876e+04 0.0000e+00  0:05:17   93

reversed flow in 16 faces on pressure-inlet 6.

Error: divergence detected in AMG solver: temperature
Error Object: ()
turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 96152 cells
还请大侠们指点一二

[ 本帖最后由 zlx198200 于 2007-7-16 17:20 编辑 ]

zlx198200

我图形具体是：

U型管位于容器内部，不知道U型管边界该如何设？我设的是interior.l另外，U型管的底部有个穿透U型管的小孔，当气体流过U型管时，可以通过小孔带走部分油，不知道这个小孔边界如何设定。还请赐教

[ 本帖最后由 zlx198200 于 2007-7-16 17:25 编辑 ]

chaobo1982

The problem can be caused by improper values for the boundary condition turbulence parameters. Check the fluent manual (which is kind of more like a textbook), about modeling turbulence.

For the case of internal flow, you basically have to consider the physical state of the fluid upon entrance to your control volume. If the fluid is coming into your volume from a fully developed turbulent pipe flow, it will have more turbulent energy than from a stagnant fluid. Think of lots of little vortices, which mostly mix things up, and those all have kinetic energy associated). This energy can be expressed as a nondimensional Intensity (a percentage is used). In addition, a Length parameter is specified.

zlx198200

先谢了，我看看，有问题接着请教啊

cpf12358

这个应该是湍流模型的选取与第一层网格高度之间不满足近壁处理关系而产生的问题，如果你没有使用壁面函数的话，第一层网格高度尽可能地小点儿，比如取为弦长的百万分之一左右；另外，边界条件中关于湍流量的设置不合理也会导致这个警告。