[hung]

FSI, transient, ANSYS12.


Ans.Core.Commands.UserReadableFailure: The CFX Solver for system Fluid Flow did not produce a results file. Detailed information can be found in the output file for the run, which can be viewed by selecting Display Monitors from the Solution cell.
at Ans.CFX.CFXCore.Data.CFXSolutionSource.HandleRunFa ilure(CommandContext context, String outFileName, String rawSolverOutput)
at Ans.CFX.CFXCore.Data.CFXSolutionSource.ReconnectRu n(CommandContext context, SolverBackgroundTask task)
at Ans.CFX.CFXCore.Data.CFXSolutionSource.RunSolver(C ommandContext context, Boolean forceResume)
at Ans.CFX.CFXCore.Data.CFXSolutionSource.Update(Comm andContext context)
at Ans.CFX.CFXCore.Commands.UpdateSolutionCommand.Exe cute(CommandContext context)
at Ans.Core.Commands.Concurrency.CommandWorkUnit.exec uteInContext(CommandContext subContext, IExecutionEngineCallback tracer)
at Ans.Core.Commands.Concurrency.BaseWorkUnit.doExecu te(IExecutionEngineCallback executionEngine, CommandContext subContext)
at Ans.Core.Commands.Concurrency.BaseWorkUnit.Execute (IExecutionEngineCallback executionEngine, Boolean dontCatchExceptions)
--- Ans.Core.Commands.CommandFailedException: The CFX Solver for system Fluid Flow did not produce a results file. Detailed information can be found in the output file for the run, which can be viewed by selecting Display Monitors from the Solution cell.
Command: CFX.UpdateSolution(Container="Solution 2")
at Ans.Core.Commands.CommandAsyncResult.RethrowFailur eException()
at Ans.Core.Commands.CommandAsyncResult.Wait(Int32 milliSecondsTimeout, Boolean exitContext)
at Ans.Core.Commands.CommandAsyncResult.Wait()
at Ans.ProjectSchematic.Data.CellTemplateEntity.Updat e(CommandContext context, IProgressMonitor progressMonitor, DataContainerReference container, List`1 downstream)
at Ans.ProjectSchematic.Update.UpdateImpl.updateCell( CommandContext context, UpdateTask task)
at Ans.ProjectSchematic.Update.UpdateImpl.<>c__Displa yClass25.<updateCellAndDependencies>b__24()
at Ans.ProjectSchematic.Update.UpdateImpl.executeWith SelectedErrorBehaviour(Op op, UpdateTask associatedTask)


and then i check in the result display


+----------------------+------+---------+---------+------------------+
| U-Mom | 1.40 | 1.6E-03 | 1.8E-02 | 5.5E-02 OK|
| V-Mom | 1.20 | 1.7E-03 | 2.2E-02 | 7.8E-02 OK|
| W-Mom | 0.90 | 1.1E-02 | 1.2E-01 | 1.2E-02 OK|
| P-Mass | 4.44 | 3.6E-02 | 4.3E-01 | 12.5 5.7E-02 OK|
+----------------------+------+---------+---------+------------------+
| K-TurbKE | 0.46 | 5.0E-02 | 4.2E-01 | 5.5 2.4E-03 OK|
| E-Diss.K | 1.65 | 1.1E-01 | 1.7E+00 | 12.2 5.0E-06 OK|
+----------------------+------+---------+---------+------------------+

+--------------------------------------------------------------------+
| ERROR #002100061 has occurred in subroutine SERVE_CLIENTS. |
| Message: |
| The connection between this CFX process and an external process |
| has died unexpectedly. The following error was received: |
| External process : ANSYS |
| Error experienced : Read |
| |
| ** This error is fatal: Terminating ANSYS CFX Solver execution ** |
| Please review the output, error and log files from both the CFX |
| and external processes to determine the cause of the error. |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| 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.


is there any idea what i should do in this case???
thanks in advance,

Hung

[Lance]

Seems like your Ansys Mechanical sovler crasched:

| External process : ANSYS |
| Error experienced : Read |

[hung]

I have no ideas at all.
and then i changed something to run the simulation again.

| Z-Disp | 0.10 | 3.8E-06 | 1.7E-05 | 6.3 1.4E-02 OK| +----------------------+------+---------+---------+------------------+

+--------------------------------------------------------------------+
| ERROR #002100011 has occurred in subroutine cVolSec. |
| Message: |
| A negative SECTOR volume has been detected. Execution will proceed |
| but this is a possible cause of robustness problems. |
| The location of the first negative volume is reported below. |
| Volume : -0.1713E-10 |
| Location : ( -0.11202E-02, 0.94309E-03, 0.41324E-03) |
| This warning may be made fatal by setting the expert parameter |
| 'negative volume option = 1'. |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #002100012 has occurred in subroutine cVolSec. |
| Message: |
| A negative ELEMENT volume has been detected. This is a fatal |
| error and execution will be terminated. The location of the first |
| negative volume is reported below. |
| Volume : -0.1870E-10 |
| Location : ( -0.16267E-02, 0.62685E-03, 0.42017E-03) |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| 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. |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| Writing crash recovery file |
+--------------------------------------------------------------------+

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




by the way, do you know what should i define in ANSYS MECHANICAL:
about the Analysis setting:
how to define: "auto time stepping" and "time step"
so the ANSYS can coupling with the CFX
now i set the "auto time stepping" off and time step is the time between each steps.

thanks,

Hung