Problems of running Oscillating plate tutorial
 

Hi everyone,

I tried play the cfx tutorial, Oscillating plate (Tutorial 23 in 12.1-version), in ansys 12.1 linux 64-bits.
I couldn use the proper workbench, so I follow the guide of 11.0-version-tutorial (P353-368, Tutorial 21).
Every step was completed as the tutorial said. I create my own oscillatingplate.inp after the Ansys, and oscillatingplate.def after Cfx.
Turn on the solver, define the run,
In Multified tab, the mechanical input file was set to oscillatingplate.inp. and rest setting left as default.
Start run.
But the solver couldn't do so
+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| ANSYS Solver terminated unexpectedly with return code 32512 |
+--------------------------------------------------------------------+


This run of the ANSYS CFX Solver has finished.


I tried to play the .pre file given in the example folder to compare. But after a progress bar appear for seconds, there's nothing. I mean literally all the bottom on the tool bar were still in grey.

If anyone knows whats I ve done wrong, or the example file has imperfect, would like to share with me, I'll be really appreciated!

Your error says that the ANSYS solver failed (i.e. the Mechanical solver). Look in that output file for the error.

Thank. I think I sorted out the solver issue. But when I run it again, it gave that
CFX encountered the error: Read. Fatal error occurred when requesting Total Mesh Displacement for Interface. and
cplg_SendCommand failed to send the command: ERROR -- CFX encountered the error: Read. Fatal error occurred when requesting Total Mesh Displacement for Interface.

I tried change value of E to larger number. But it still show the same problem.


LIBRARY:
FLOW: Flow Analysis 1
ANALYSIS TYPE:
Option = Transient
EXTERNAL SOLVER COUPLING:
ANSYS Input File = C:\Documents and Settings\CFD\My Documents\FSI \
training\CFX tutorial23\Trail004\OscillatingPlate.inp
Option = ANSYS MultiField
COUPLING TIME CONTROL:
COUPLING INITIAL TIME:
Option = Value
Time = 0 [s]
END
COUPLING TIME DURATION:
Option = Total Time
Total Time = 5 [s]
END
COUPLING TIME STEPS:
Option = Timesteps
Timesteps = 0.1 [s]
END
END
END
INITIAL TIME:
Option = Coupling Initial Time
END
TIME DURATION:
Option = Coupling Time Duration
END
TIME STEPS:
Option = Coupling Timesteps
END
END
DOMAIN: Default Domain
Coord Frame = Coord 0
Domain Type = Fluid
Location = B28
BOUNDARY: Default Domain Default
Boundary Type = WALL
Location = F34.28,F35.28,F36.28,F37.28,F38.28
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = No Slip Wall
END
MESH MOTION:
Option = Stationary
END
END
END
BOUNDARY: Interface
Boundary Type = WALL
Location = Interface
BOUNDARY CONDITIONS:
MASS AND MOMENTUM:
Option = No Slip Wall
END
MESH MOTION:
ANSYS Interface = FSIN_1
Option = ANSYS MultiField
Receive from ANSYS = Total Mesh Displacement
Send to ANSYS = Total Force
END
END
END
BOUNDARY: Sym1
Boundary Type = SYMMETRY
Location = Sym1
BOUNDARY CONDITIONS:
MESH MOTION:
Option = Unspecified
END
END
END
BOUNDARY: Sym2
Boundary Type = SYMMETRY
Location = Sym2
BOUNDARY CONDITIONS:
MESH MOTION:
Option = Unspecified
END
END
END
DOMAIN MODELS:
BUOYANCY MODEL:
Option = Non Buoyant
END
DOMAIN MOTION:
Option = Stationary
END
MESH DEFORMATION:
Option = Regions of Motion Specified
MESH MOTION MODEL:
Option = Displacement Diffusion
MESH STIFFNESS:
Option = Increase near Small Volumes
Stiffness Model Exponent = 10
END
END
END
REFERENCE PRESSURE:
Reference Pressure = 1 [atm]
END
END
FLUID DEFINITION: Fluid 1
Material = Fluid
Option = Material Library
MORPHOLOGY:
Option = Continuous Fluid
END
END
FLUID MODELS:
COMBUSTION MODEL:
Option = None
END
HEAT TRANSFER MODEL:
Option = None
END
THERMAL RADIATION MODEL:
Option = None
END
TURBULENCE MODEL:
Option = Laminar
END
END
END
INITIALISATION:
Option = Automatic
INITIAL CONDITIONS:
Velocity Type = Cartesian
CARTESIAN VELOCITY COMPONENTS:
Option = Automatic with Value
U = 0 [m s^-1]
V = 0 [m s^-1]
W = 0 [m s^-1]
END
STATIC PRESSURE:
Option = Automatic with Value
Relative Pressure = 0 [Pa]
END
END
END
OUTPUT CONTROL:
MONITOR OBJECTS:
MONITOR BALANCES:
Option = Full
END
MONITOR FORCES:
Option = Full
END
MONITOR PARTICLES:
Option = Full
END
MONITOR POINT: Monitor Point 1
Cartesian Coordinates = 0 [m], 1 [m], 0 [m]
Option = Cartesian Coordinates
Output Variables List = Total Mesh Displacement X
END
MONITOR RESIDUALS:
Option = Full
END
MONITOR TOTALS:
Option = Full
END
END
RESULTS:
File Compression Level = Default
Option = Standard
END
TRANSIENT RESULTS: Transient Results 1
File Compression Level = Default
Include Mesh = No
Option = Selected Variables
Output Variables List = Velocity,Pressure,Total Mesh Displacement
OUTPUT FREQUENCY:
Option = Every Coupling Step
END
END
END
SOLVER CONTROL:
ADVECTION SCHEME:
Option = High Resolution
END
CONVERGENCE CONTROL:
Maximum Number of Coefficient Loops = 3
Minimum Number of Coefficient Loops = 2
Timescale Control = Coefficient Loops
END
CONVERGENCE CRITERIA:
Residual Target = 1.E-4
Residual Type = RMS
END
EXTERNAL SOLVER COUPLING CONTROL:
COUPLING DATA TRANSFER CONTROL:
Convergence Target = 1e-2
Under Relaxation Factor = 0.75
END
COUPLING STEP CONTROL:
Maximum Number of Coupling Iterations = 10
Minimum Number of Coupling Iterations = 1
SOLUTION SEQUENCE CONTROL:
Solve ANSYS Fields = Before CFX Fields
END
END
END
TRANSIENT SCHEME:
Option = Second Order Backward Euler
TIMESTEP INITIALISATION:
Option = Automatic
END
END
END
END
COMMAND FILE:
Version = 12.1
Results Version = 12.1
END
SIMULATION CONTROL:
EXECUTION CONTROL:
EXECUTABLE SELECTION:
Double Precision = Off
END
INTERPOLATOR STEP CONTROL:
Runtime Priority = Standard
MEMORY CONTROL:
Memory Allocation Factor = 1.0
END
END
MFX RUN CONTROL:
MFX RUN DEFINITION:
MFX Run Mode = Start ANSYS and CFX
Process ANSYS Input File = On
Restart ANSYS Run = Off
END
MFX SOLVER CONTROL:
ANSYS Installation Root = C:\Program Files\ANSYS Inc\v121\ansys
ANSYS License = AA_T_A
END
END
PARALLEL HOST LIBRARY:
HOST DEFINITION: aaaaaaa
Remote Host Name = AAAAAAAA
Host Architecture String = winnt-amd64
Installation Root = C:\Program Files\ANSYS Inc\v%v\CFX
END
END
PARTITIONER STEP CONTROL:
Multidomain Option = Independent Partitioning
Runtime Priority = Standard
EXECUTABLE SELECTION:
Use Large Problem Partitioner = Off
END
MEMORY CONTROL:
Memory Allocation Factor = 1.0
END
PARTITIONING TYPE:
MeTiS Type = k-way
Option = MeTiS
Partition Size Rule = Automatic
END
END
RUN DEFINITION:
Run Mode = Full
Solver Input File = C:\Documents and Settings\CFD\My Documents\FSI \
training\CFX tutorial23\Trail004\Fluid Flow.def
END
SOLVER STEP CONTROL:
Runtime Priority = Standard
MEMORY CONTROL:
Memory Allocation Factor = 1.0
END
PARALLEL ENVIRONMENT:
Number of Processes = 1
Start Method = Serial
END
PROCESS COUPLING:
Process Name = CFX
Host Port = 2000
Host Name = AAAAAAA

END
END
END
END

I have the same error 32512 in this tutorial...
Did You solve the problem?
What do You mean by "I think I sorted out the solver issue." ?

Hi guys!!! Is there anything new about this error code? I am getting this too and it s driving me crazy!

I am quite sure that there will never be any proper solution because the newer versions of wb are dealing with the FSI setup quite different... and stable when it comes to the tutorials. Nonetheless my personal impression is in 9 of 10 cases it is crashing due to false constraints in FEM or wrong mesh movement on cfd-side.

the error from above is indicating a structural problem so with out the ansys setup there is no way to shed any light on this.

Matthias

Well i should have mentioned that i m getting this error while trying to perform a different fsi problem and not the tutorial..so you are saying that we have to be a little bit lucky..thank you anyway

transient or steady?
Some thoughts:
+Check your displacement at the interfaces via monitorpoints
+display the convergence WITHIN each iteration (somewhere near the output options in CFX --> so you can judge about the displacements for every iteration(couplingstepstagger iteration))
+did you try the under-relaxation?
+converge the forces at the interfaces less than 0.01
+converge the mesh displacement pretty good (max 1E-5, more iterations 15-20)
+ write a full backup every timestep/coupling step with "export mesh"-option active to see whats going on
+ whats the density ratio between solid and fluid (--> added mass effect)?

should be enough for now...

neewbie

The analysis is transient and the error appears at first after pressing start button. Partitioning and iteration do not even begin. The ratio is about 2. if that helps, before seting the structural analysis i first perform a thermal analysis on the solid domain in order to apply thermal load on it and then i move to cfx..

can you post the cfx and ANSYS-solver output?

Setting up CFX Solver run ...


+--------------------------------------------------------------------+
| |
| Processing ANSYS Input File (Running CCL2MF) |
| |
+--------------------------------------------------------------------+

Created
/home/passos/CFX/PhD/deformation/defor1_pending_tasks/dp0_CFX_Solution-
_2/Fluid Flow CFX_001.ansys/ANSYS.mf

+--------------------------------------------------------------------+
| |
| Starting ANSYS Solver |
| |
+--------------------------------------------------------------------+


+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| ANSYS Solver terminated unexpectedly with return code 32512 |
+--------------------------------------------------------------------+


This run of the ANSYS CFX Solver has finished.

and the ansys output?

You are talking about the file having .stdout format? It seems to be empty (0kb). Sorry i am still new at this and i do not know how to open it :(

okay... to bad. this really sound like ansys crashing in the very first place.
+try to deactivate the force-interaction by setting the cfx under relax to 0
+ try to change the order of the loop (there is a setting in cfx-pre that let you decide whether to solve ansys or cfx first)
+ deactivate the temp. load and start with an unstressed ansys-model, just to see if it starts.


PS.:did you have proper licences?

Yes i use official licences. Thank you very much for being so helpful. I hope all these will do..:)

Hello it's me again. Neewbie i followed your suggestions and i managed to run a simulation. However, i m getting no wall deformation at all. As you can see what i get for mesh displacement is this:

| SOLVING : Mesh Displacement |
----------------------------------------------------------------------
| Equation | Rate | RMS Res | Max Res | Linear Solution |
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Y-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Z-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 5.9 0.0E+00 OK|
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Y-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Z-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 5.9 0.0E+00 OK|
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Y-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Z-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 5.9 0.0E+00 OK|
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Y-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Z-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 5.9 0.0E+00 OK|
+----------------------+------+---------+---------+------------------+
| X-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Y-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 0.0E+00 OK|
| Z-Disp | 0.00 | 0.0E+00 | 0.0E+00 | 5.9 0.0E+00 OK|


do you know any possible reason why does this happen and how to fix it?

just guessing but ... looks like there is no displacement?
1# reason because there are no forces (due to false coupling/ hard underrelax.)
2# struct. is to stiff to move by given external (CFD-)Forces

so... check for the forces transmitted via the interface,
should like this
in the ANSYS OUT FILE



also check for the maxVal(Total Mesh Displacment)@Interface1 2 3 4 to see if there is anything moving.

so you can pin down what´s happening and what´s the reason. First place is to check the interfaces for the forces. If there are any then the "problem" is on the structural side.

hi,
now,i do FSI ansys,and in transient structural setup,thermal condition is set on structure，when start,i meet this message"Unable to get ANSYS temperature from data-level structure for MultiField analysis",have u face it?
could give me some advises.

Data transfer isn't working
 

Hi everybody,
I'm implementing the tutorial Two way FSI using ANSYS Fluent Part-1 in https://www.youtube.com/watch?v=DGPmyGFnzhA but I'm having some trouble during the data transfer between the fluid and solid domain, it simply doesn't work and doesn't apear any error (image attached), the solver isn't updating the solution. My licenses are ANSYS ACADEMIC RESEARCH and TEACHING ADVANCED. Does anyone have any idea what the problem may be? I already try other FSI tutorials and the same thing occurs. Could be a problem of software definitions or my license specifications?
Thanks in advance

Try the fluent forum.

Thanks for your answer. I will do it!