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 kmgraju February 22, 2013 02:29

Two way Fsi Problem- Non linear problem

Dear friends

I am doing two way fsi.
Non linear analysis has been performed in ANSYS. ( I am using work bench)
I have an error in ANSYS as shown below. Please help me to figure out the problem.

Thank you

Regards
Govind

*** NOTE *** CP = 22.605 TIME= 14:08:04
ANSYS and CFX are using different unit systems. Unit conversions will
be made for all data transferred between the field solvers.
*** WARNING *** CP = 22.761 TIME= 14:08:04
ANSYS results must be written into the database for Multifield
analysis. The /CONFIG,NOELDB,1 command is ignored.
SERVE GLOBAL COUPLING INFORMATION
SECOND SYNCHRONIZATION POINT OF MASTER CODE:
GET INTERFACE MESHES, INITAIL VALUES, and RESTART LOADS
2nd sync. point: Get interface mesh
SURFACE INTERPOLATION MAPPING
PROFILE PRESERVING INTERPOLATION MAPPING
--------------------------------------------------------------------
Sending region name = 1
From sending process = ANSYS
to receiving process = CFX
Transferring variable = DISP
Percentage complete = 25 % ...
Percentage complete = 50 % ...
Percentage complete = 75 % ...
Percentage complete = 100 % ...
Processing complete
--------------------------------------------------------------------

CONSERVATIVE INTERPOLATION MAPPING
--------------------------------------------------------------------
Sending region name = wall
From sending process = CFX
to receiving process = ANSYS
Transferring variable = Total Force
Sending Side: Total Area = 3.84063E-04
Non-Matching Area Fraction = 0.0000%
No. of Un-Mapped Nodes = 0
Receiving Side: Total Area = 3.84048E-04
Non-Matching Area Fraction = 0.0000%
No. of Un-Mapped Nodes = 0
Processing complete
--------------------------------------------------------------------
1
***** ANSYS - ENGINEERING ANALYSIS SYSTEM RELEASE 14.0 *****
ANSYS Multiphysics
00471198 VERSION=WINDOWS x64 14:13:09 FEB 22, 2013 CP= 292.174
2 way fsi--Transient (A5)
. . . . . . . . . . . . . . . . . . . . . . .
MULTI FIELD ANALYSIS STEP OPTIONS
TIME AT BEGINNING OF ANALYSIS. . . . . . . 0.0000
TIME AT END OF ANALYSIS. . . . . . . . . . 1.0000
TIME STEP NUMBER. . . . . . . . . . . . . . . 1
STAGGER ITERATION NUMBER. . . . . . . . . . . 1. CUM MF ITER = 1
FIELD INFORMATION FOR MULTIFIELD ANALYSIS
CURRENT FIELD NAME FOR ANALYSIS. . . . . ANSYS
TIME AT BEGINNING OF CURRENT ANALYSIS. . . 0.0000
TIME AT END OF CURRENT ANALYSIS. . . . . . 0.50000E-02
THIRD SYNCHRONIZATION POINT OF MASTER CODE:
SERVE SLAVES THE TIME STEP CONTROL INFORMATION TO START A SOLVE
FOURTH SYNCHRONIZATION POINT OF MASTER CODE:
LOAD TRANSFER AT THE BEGINNING OF SOLUTION
FORCE SUM FOR FIELD 1 ACROSS INTERFACE 1
RECEIVING FORCE FX SUM = 0.32437E-02
RECEIVING FORCE FY SUM =-0.39910E-06
RECEIVING FORCE FZ SUM = 0.47505E-04

*** WARNING *** CP = 342.266 TIME= 14:14:53
Element shape checking is currently inactive. Issue SHPP,ON or
SHPP,WARN to reactivate, if desired.
*** WARNING *** CP = 343.187 TIME= 14:14:53
SOLID186 wedges are recommended only in regions of relatively low
*** NOTE *** CP = 343.764 TIME= 14:14:54
The model data was checked and warning messages were found.
Please review output or errors file ( F:\2 way fsi\2 way
CFX_001.ansys\ANSYS.err ) for these warning messages.
*** SELECTION OF ELEMENT TECHNOLOGIES FOR APPLICABLE ELEMENTS ***
--- GIVE SUGGESTIONS AND RESET THE KEY OPTIONS ---
ELEMENT TYPE 1 IS SOLID186. KEYOPT(2)=0 IS SUGGESTED AND HAS BEEN RESET.
KEYOPT(1-12)= 0 0 0 0 0 0 0 0 0 0 0 0
ELEMENT TYPE 2 IS SOLID186. KEYOPT(2)=0 IS SUGGESTED AND HAS BEEN RESET.
KEYOPT(1-12)= 0 0 0 0 0 0 0 0 0 0 0 0

1
***** ANSYS - ENGINEERING ANALYSIS SYSTEM RELEASE 14.0 *****
ANSYS Multiphysics
00471198 VERSION=WINDOWS x64 14:14:54 FEB 22, 2013 CP= 343.967
2 way fsi--Transient (A5)

S O L U T I O N O P T I O N S
PROBLEM DIMENSIONALITY. . . . . . . . . . . . .3-D
DEGREES OF FREEDOM. . . . . . UX UY UZ
ANALYSIS TYPE . . . . . . . . . . . . . . . . .TRANSIENT
SOLUTION METHOD. . . . . . . . . . . . . . .FULL
OFFSET TEMPERATURE FROM ABSOLUTE ZERO . . . . . 273.15
NONLINEAR GEOMETRIC EFFECTS . . . . . . . . . .ON
NEWTON-RAPHSON OPTION . . . . . . . . . . . . .PROGRAM CHOSEN
GLOBALLY ASSEMBLED MATRIX . . . . . . . . . . .SYMMETRIC
*** WARNING *** CP = 344.216 TIME= 14:14:54
Material number 4 (used by element 316847 ) should normally have at
least one MP or one TB type command associated with it. Output of
energy by material may not be available.
*** NOTE *** CP = 344.809 TIME= 14:14:55
The step data was checked and warning messages were found.
Please review output or errors file ( F:\2 way fsi\2 way
CFX_001.ansys\ANSYS.err ) for these warning messages.
*** NOTE *** CP = 344.809 TIME= 14:14:55
This nonlinear analysis defaults to using the full Newton-Raphson
solution procedure. This can be modified using the NROPT command.
SOLCONTROL,ON uses sparse matrix direct solver
*** NOTE *** CP = 344.809 TIME= 14:14:55
The conditions for direct assembly have been met. No .emat or .erot
files will be produced.
L O A D S T E P O P T I O N S
LOAD STEP NUMBER. . . . . . . . . . . . . . . . 1
TIME AT END OF THE LOAD STEP. . . . . . . . . . 0.50000E-02
TIME STEP SIZE. . . . . . . . . . . . . . . . . 0.50000E-02
MAXIMUM NUMBER OF EQUILIBRIUM ITERATIONS. . . . 15
NONLINEAR STABILIZATION . . . . . . . . . . . .ON (CONSTANT)
STEP CHANGE BOUNDARY CONDITIONS . . . . . . . . YES
STRESS-STIFFENING . . . . . . . . . . . . . . . ON
TRANSIENT (INERTIA) EFFECTS
STRUCTURAL DOFS. . . . . . . . . . . . . . . ON
TRANSIENT INTEGRATION PARAMETERS
GAMMA. . . . . . . . . . . . . . . . . . . . 0.10000
ALPHA. . . . . . . . . . . . . . . . . . . . 0.30250
DELTA. . . . . . . . . . . . . . . . . . . . 0.60000
USING HHT TIME INTEGRATION
ALPHAF . . . . . . . . . . . . . . . . . . . 0.10000
ALPHAM . . . . . . . . . . . . . . . . . . . 0.0000
TERMINATE ANALYSIS IF NOT CONVERGED . . . . . .YES (EXIT)
CONVERGENCE CONTROLS. . . . . . . . . . . . . .USE DEFAULTS
PRINT OUTPUT CONTROLS . . . . . . . . . . . . .NO PRINTOUT
DATABASE OUTPUT CONTROLS
ITEM FREQUENCY COMPONENT
ALL NONE
NSOL ALL
RSOL ALL
STRS ALL
EPEL ALL
EPPL ALL
V ALL
A ALL

SOLUTION MONITORING INFO IS WRITTEN TO FILE= ANSYS.mntr
*** ERROR *** CP = 358.132 TIME= 14:15:06
The normal of target element 497715 is not consistent with the normal
of target element 502142. Please use the ENORM command to correct it.
*** ERROR *** CP = 358.132 TIME= 14:15:06
The normal of target element 497774 is not consistent with the normal
of target element 502143. Please use the ENORM command to correct it.
*** ERROR *** CP = 358.147 TIME= 14:15:06
The normal of target element 499695 is not consistent with the normal
of target element 505594. Please use the ENORM command to correct it.
*** ERROR *** CP = 358.147 TIME= 14:15:06
The normal of target element 499754 is not consistent with the normal
of target element 507119. Please use the ENORM command to correct it.
*** ERROR *** CP = 399.082 TIME= 14:15:48
The normal of contact element 493635 is not consistent with the normal
of contact element 501796. Please use the ENORM command to correct
it.
*** ERROR *** CP = 399.082 TIME= 14:15:48
The normal of contact element 493694 is not consistent with the normal
of contact element 501797. Please use the ENORM command to correct
it.
*** ERROR *** CP = 399.113 TIME= 14:15:48
The normal of contact element 495615 is not consistent with the normal
of contact element 504880. Please use the ENORM command to correct
it.
*** ERROR *** CP = 399.113 TIME= 14:15:48
The normal of contact element 495674 is not consistent with the normal
of contact element 506773. Please use the ENORM command to correct
it.
MAXIMUM NUMBER OF EQUILIBRIUM ITERATIONS HAS BEEN MODIFIED
TO BE, NEQIT = 25, BY SOLUTION CONTROL LOGIC.

NUMBER OF WARNING MESSAGES ENCOUNTERED= 6
NUMBER OF ERROR MESSAGES ENCOUNTERED= 8

***** PROBLEM TERMINATED BY INDICATED ERROR(S) OR BY END OF INPUT DATA *****
+--------------------- A N S Y S S T A T I S T I C S ------------------------+
Release: 14.0 Build: UP20111024 Platform: WINDOWS x64
Date Run: 02/22/2013 Time: 14:15
Windows Process ID: 3296
Compiler: Intel(R) FORTRAN Compiler Version 11.1.0 (Build: 20100414)
Microsoft(R) Visual C/C++ Compiler Version 15.0 (Build: 30729)
Intel(R) Math Kernel Library Version 10.3.3 Product Build 20110314
Number of cores: 2 (Shared Memory Parallel)
GPU Acceleration: Not Requested
Job Name: ANSYS
Working Directory: F:\2 way fsi\2 way fsi_pending_tasks\dp0_CFX 1_Solution_4
Elapsed time spent pre-processing model (/PREP7) : 5.9 seconds
Elapsed time spent solution - preprocessing : 7.2 seconds
Elapsed time spent computing solution : 43.6 seconds
Elapsed time spent solution - postprocessing : 0.0 seconds
Elapsed time spent post-processing model (/POST1) : 0.0 seconds
Maximum total memory used : 2586.0 Mbytes
Maximum total memory allocated : 2820.0 Mbytes
+------------------ E N D A N S Y S S T A T I S T I C S -------------------+

*---------------------------------------------------------------------------*
| |
| ANSYS RUN COMPLETED |
| |
|---------------------------------------------------------------------------|
| |
| Release 14.0 UP20111024 WINDOWS x64 |
| |
|---------------------------------------------------------------------------|
| |
| Database Requested(-db) 512 MB Scratch Memory Requested 512 MB |
| Maximum Database Used 821 MB Maximum Scratch Memory Used 1558 MB |
| |
|---------------------------------------------------------------------------|
| |
| CP Time (sec) = 400.876 Time = 14:15:49 |
| Elapsed Time (sec) = 498.000 Date = 02/22/2013 |
| |
*---------------------------------------------------------------------------*

 stumpy February 22, 2013 18:16

This error likely has nothing to do with FSI. Run it as a structural only case, you should get the same error, but it will be easier for structural experts to debug.

 kmgraju February 23, 2013 07:37

Quote:
Hi all
How to rectify the following error in workbench
The normal of target element 497715 is not consistent with the normal
of target element 502142. Please use the ENORM command to correct it.
*** ERROR *** CP = 358.132 TIME= 14:15:06

Thank you

 Executnr December 5, 2013 16:50

Quote:
 Originally Posted by kmgraju (Post 409666) Hi all How to rectify the following error in workbench The normal of target element 497715 is not consistent with the normal of target element 502142. Please use the ENORM command to correct it. *** ERROR *** CP = 358.132 TIME= 14:15:06 Thank you
Did you solve your problem? I am having the same issue in structural and don't know how to implement the ENORM command....

Thanks
Wayne

 abcdef April 28, 2015 11:15

It's more safe to let ansys create connections automatically: Create a "Connection Group" in ansys mechanical under the "Connections" part, choose the bodies you'd like to connect and also a fitting tolerance value. Also choose the connections to behave asymmetric. After that it should work (at least it did for me).

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