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-   -   What's wrong with FSI? (http://www.cfd-online.com/Forums/cfx/127170-whats-wrong-fsi.html)

Jordane December 5, 2013 00:24

What's wrong with FSI?
 
================================================== ====================
TIME STEP = 1049 SIMULATION TIME = 2.4500E-02 CPU SECONDS = 8.829E+05
(THIS RUN: 49 2.4500E-02 8.829E+05)
----------------------------------------------------------------------
| COUPLING/STAGGER ITERATION = 1 |
----------------------------------------------------------------------
| SOLVING : Mesh Displacement |
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.89 | 5.2E-03 | 5.6E-02 | 1.5E-02 OK|
| Y-Disp | 0.95 | 6.4E-03 | 6.1E-02 | 1.4E-02 OK|
| Z-Disp | 1.01 | 1.2E-01 | 1.0E+00 | 5.2 1.4E-02 OK|
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.01 | 6.8E-05 | 1.5E-03 | 9.4E-02 OK|
| Y-Disp | 0.01 | 8.4E-05 | 1.9E-03 | 9.0E-02 OK|
| Z-Disp | 0.01 | 1.5E-03 | 3.1E-02 | 13.5 9.4E-02 OK|
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.27 | 1.9E-05 | 5.0E-04 | 7.4E-02 OK|
| Y-Disp | 0.27 | 2.3E-05 | 5.4E-04 | 7.2E-02 OK|
| Z-Disp | 0.27 | 4.2E-04 | 1.0E-02 | 17.7 7.3E-02 OK|
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.35 | 6.5E-06 | 2.7E-04 | 7.4E-02 OK|
| Y-Disp | 0.33 | 7.5E-06 | 2.8E-04 | 7.3E-02 OK|
| Z-Disp | 0.34 | 1.4E-04 | 5.3E-03 | 9.3 7.3E-02 OK|
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.49 | 3.2E-06 | 2.3E-04 | 7.8E-02 OK|
| Y-Disp | 0.43 | 3.3E-06 | 2.3E-04 | 7.7E-02 OK|
| Z-Disp | 0.46 | 6.5E-05 | 4.6E-03 | 5.2 7.7E-02 OK|
+----------------------+------+---------+---------+------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| CFX encountered the error: |
| 0. A folded mesh has oc- |
| curred. This process will shut down as soon as possible. |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine SYNP_CHKCONV_PRC |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+
+--------------------------------------------------------------------+
| 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 |
| D:\Work\Project-2-1\Analysis_2\test_1_fsi_001: |
| |
| 1000_full.trn |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| ANSYS Solver terminated with return code 3840 |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| The results from this run of the ANSYS solver have been written to |
| D:\Work\Project-2-1\Analysis_2\test_1_fsi_001.ansys |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| The following user files have been saved in the directory |
| D:\Work\Project-2-1\Analysis_2\test_1_fsi_001: |
| |
| mon |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| Warning! |
| |
| After waiting for 60 seconds, 1 solver manager process(es) appear |
| not to have noticed that this run has ended. You may get errors |
| removing some files if they are still open in the solver manager. |
+--------------------------------------------------------------------+

This run of the ANSYS CFX Solver has finished.

Lance December 5, 2013 03:39

Whats wrong with FSI? Well.... in your case your mesh has folded:
+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| CFX encountered the error: |
| 0. A folded mesh has oc- |
| curred. This process will shut down as soon as possible. |
| |
| |
| |
+--------------------------------------------------------------------+

Try to improve mesh quality at the location that folded.
Check that the deformation you get is reasonable.


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