流固耦合的计算中出现error号，该到哪里去查找相应对策

xiao9136

申明，本人是新手。
很多次计算出错，然后给出一个错误号，有些能看懂有些则看不懂，请问有没有查找相应的错误号的地方，比如help里面有没有相应的东西？

谢谢。

huahua2005

adina-f Theory and Modeling Guide
13 other topics
Appendix-3 List of error/warning messages
我也是新手^_^

xiao9136

原帖由 huahua2005 于 2007-7-29 17:09 发表
adina-f Theory and Modeling Guide
13 other topics
Appendix-3 List of error/warning messages
我也是新手^_^

多谢斑竹。

不过我按照别人介绍的动画（完整的24的操作，其实跟help里面完全一样）以及例子24的pdf，做了两遍，怎么就海事做不通呢？
一直提示*** ERROR *** CODE ADF3060:

    Unsuccessful while fluid nodes on fluid-structure interfaces are moved.

ps：我用的是8.1

huahua2005

24例题是不能算到最后一步的，只能算完19步：
The run stops in time step 20. This is OK; as we will see, the run stops because the critical
velocity was exceeded.

xiao9136

原帖由 huahua2005 于 2007-7-29 17:20 发表
24例题是不能算到最后一步的，只能算完19步：
The run stops in time step 20. This is OK; as we will see, the run stops because the critical
velocity was exceeded.

问题我的情况是一步都没有算，我传上idb文件，版主帮我看下？
万分感谢。

xiao9136

原帖由 xiao9136 于 2007-7-29 17:16 发表




多谢斑竹。

不过我按照别人介绍的动画（完整的24的操作，其实跟help里面完全一样）以及例子24的pdf，做了两遍，怎么就海事做不通呢？
一直提示*** ERROR *** CODE ADF3060:

    Unsuccessful w ...

查了这个错误号：
This message indicates that the solution procedure in the ADINA-F
fluid model is unsuccessful in solving moving meshes. You could find
out more information from the <fluid>.log file.
If this happens before the FSI iterations, it is likely that the mesh is
wrong. It could be that the gaps existing between the interfaces of fluid
and solid are too large. A wrong data file may also cause this error. In
this case, refer to the suggestions for message ADF2111.
If this happens during the FSI iteration, the structure displacements
may be incorrect or too distorted. It is usually a sign that the solution
procedure is divergent. It is important to refer to the suggestions under
the topics “Model preparation and testing” and “Formulation of fluidstructure
interactions”.

有可能是网格划分的错误，但是我的网格划分完全是按照help来的呀！

huahua2005

是边界条件错了~~
Outlet velocity: We need to set all of the x velocities to be uniform at the outlet (surface 5). We
do this by constraining the x velocities on surface 5 to be equal to the x velocity at point 5 (which
is at the center of the outlet). Choose Model
Constraints
Constraint Equations and add
constraint set 1. In the Slave box, set the Entity Type to Surface, set the Entity # to 5 and make
sure that the Slave DOF is set to X-Velocity. Then in the first row of the table, set the Point # to
5 and the Master Degree of Freedom to X-Velocity. Then click OK.
把现在的边界条件删了，用上面说的这个就可以了

huahua2005

xiao9136

ok了！
不过这个约束似乎不太合理
这个面上的速度怎么可能都跟中心点的速度相同的，
管道里的流动不是这样的。 肯定是中心点的速度最大，靠近壁面就应该是零了。

[ 本帖最后由 xiao9136 于 2007-7-29 20:32 编辑 ]

huahua2005

这可能跟SLIP WALL的条件有关吧，加上流速比较大,在这种条件下我觉得流速分布可能是均布的~~
例题的解释似乎是怕出口的水在重力条件下流掉了，可能我理解的不对 ~~

vincent_zhu

*** ERROR *** CODE ADF3043:

    Unsuccessful in solid model for fluid-structure interaction. Last status
    in solid model is "COMPUTE       ".

耦合的时候总是出现上面这个问题，并且都是第一步跌代就出错。察看help里面是这样的
*** ERROR *** CODE ADF3043:
Unsuccessful in solid model for fluid-structure interaction. Last status
in solid model is "CALLING_STAGE".


这两个last status  分别是   "COMPUTE       ".和"CALLING_STAGE".有区别啊！

[ 本帖最后由 vincent_zhu 于 2007-7-30 11:30 编辑 ]

yumingkun

关于例题24可不可以修改成为水击问题：将出口处处理成流了2秒后再堵起来，同时入口速度不变？
能够做到这个效果么？

[ 本帖最后由 yumingkun 于 2007-7-30 10:02 编辑 ]