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Old   May 2, 2013, 22:57
Default FSI calculation error
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zhichao
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Dear all:

I am newcomer to CFX analysis. I want to to the FSI two way coupled analysis.

My target is to simulate a diaphragm diffuser micro pump.
Periodic force is applied on a flexible diaphragm, then the diaphragm deforms. The diaphragm displacement is then applied as the CFX boundary condition and calculate the flow.

First I do the CFX tutorial chapter 23. Oscillating Plate with Two-Way Fluid-Structure Interaction.

Then I build my own case, it is similar to the tutorial case. I upload it in the attachment 1. it contains a solid flexible diaphragm and fluid region.

Then I do the mesh. in attachment 2.

Then the setting is the same as the tutorial. When I run the CFX calculation.
There is an error occurs.

"The ANSYS CFX solver exited with return code 1. No results file has been created."

The detailed information is shown in the following:

+--------------------------------------------------------------------+
| Convergence History |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| Writing transient file 0_CS.trn |
| Name : Transient Results 1 |
| Type : Selected Variables |
| Option : Every Coupling Step |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| CFX encountered the error: Read. Fatal error occurred when reque- |
| sting Total Mesh Displacement for Interface. |

| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| cplg_SendCommand failed to send the command: ERROR -- CFX encount- |
| ered the error: Read. Fatal error occurred when requesting Total |
| Mesh Displacement for Interface. |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine cplg_SendCommand |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver exited with return code 1. No results file |
| has been created. |
+--------------------------------------------------------------------+

End of solution stage.

+--------------------------------------------------------------------+
| The following transient and backup files written by the ANSYS CFX |
| solver have been saved in the directory |
| C:/Users/zhichao/Desktop/3D_pending_tasks/dp0_CFX_Solution_1/Flui- |
| d_006: |
| |
| 0_CS.trn |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| ANSYS Solver terminated with return code 256 |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| The results from this run of the ANSYS solver have been written to |
| C:\Users\zhichao\Desktop\3D_pending_tasks\dp0_CFX_ Solution_1\Flui- |
| d_006.ansys |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| The following user files have been saved in the directory |
| C:/Users/zhichao/Desktop/3D_pending_tasks/dp0_CFX_Solution_1/Flui- |
| d_006: |
| |
| mon |
+--------------------------------------------------------------------+


This run of the ANSYS CFX Solver has finished.


Can you help me?
Thank you very much.
Attached Images
File Type: jpg 1.structure.jpg (81.6 KB, 8 views)
File Type: jpg 2. Meshing.jpg (94.8 KB, 7 views)
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Old   May 5, 2013, 07:58
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omid
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Check your mesh and sure that these is not any error in Ansys transient structural, check your boundary condition and reduce time step.
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Old   May 6, 2013, 06:48
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zhichao
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Quote:
Originally Posted by omidiut View Post
Check your mesh and sure that these is not any error in Ansys transient structural, check your boundary condition and reduce time step.
Thank you very much. I will check as you adviced.
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