CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS

Two way FSI in ANSYS 13(CFX + Transient Structural)

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   May 1, 2011, 07:34
Default Two way FSI in ANSYS 13(CFX + Transient Structural)
  #1
k_k
Member
 
Kailash
Join Date: May 2011
Location: London, UK
Posts: 45
Rep Power: 5
k_k is on a distinguished road
Hi, Please help me, I am trying to run 2 way FSI for a membrane pump. My previous FSI runs on simpler geometries gave good results.

I come across the following errors and warning,

1. Material number 2 (used by element 7393 ) should normally have at least
one MP or one TB type command associated with it. Output of energy by
material may not be available.

2. Element shape checking is currently inactive. Issue SHPP,ON or
SHPP,WARN to reactivate, if desired.

3. ANSYS results must be written into the database for Multifield
analysis. The /CONFIG,NOELDB,1 command is ignored.

4. This load step will be a static (steady-state) step. (Although my load is transient)

5. ANSYS and CFX use different Units

Have any one of you come across these warnings? If Yes, do u knw, how to fix them?

Please reply

Many Thanks
k_k is offline   Reply With Quote

Old   May 12, 2011, 03:51
Unhappy help regarding fsi
  #2
Member
 
Muhammad Amir
Join Date: May 2011
Posts: 30
Rep Power: 5
solomedic is on a distinguished road
hello, I am doing fsi of agard445.6 wing because it is used as benchmark in aeroelastic analysis,but I dont know where to find geometry of that wing, please help me on that.
solomedic is offline   Reply With Quote

Old   May 26, 2011, 15:43
Default
  #3
Senior Member
 
Join Date: Apr 2009
Posts: 489
Rep Power: 11
stumpy is on a distinguished road
Those are all just warnings. None of them look like a problem.
stumpy is offline   Reply With Quote

Old   June 7, 2011, 05:03
Default
  #4
Member
 
Join Date: Apr 2010
Location: Pisa / Italy
Posts: 56
Rep Power: 6
Atze is on a distinguished road
Hi,

@ K_K : can i run a 2 way fsi in ansys13 using fluent instead of cfx? have you some tutorial or advice?

thank you very much
Atze is offline   Reply With Quote

Old   October 27, 2011, 10:53
Default
  #5
Member
 
Elaine
Join Date: Jul 2011
Posts: 45
Rep Power: 4
lingdeer is on a distinguished road
I have the same problem....but it just forces my FSI simulation to stop
(no error but same warnings....)
It works for the steady case though (warnings are ignored)
but transient it didnt work....
lingdeer is offline   Reply With Quote

Old   November 4, 2011, 04:56
Default
  #6
Senior Member
 
Matthias Voß
Join Date: Mar 2009
Location: Berlin, Germany
Posts: 393
Rep Power: 9
mvoss is on a distinguished road
hey,

i am also working on smth. very similar. I can confirm that the warnings mentioned above are not crucial for the FSI. Is your run really stopping or is it crashing ? What is the latest error?

neewbie
mvoss is offline   Reply With Quote

Old   November 6, 2011, 16:55
Default
  #7
Member
 
Elaine
Join Date: Jul 2011
Posts: 45
Rep Power: 4
lingdeer is on a distinguished road
I tried many times and the same error showed up:



CFSImod--Transient (A5)

. . . . . . . . . . . . . . . . . . . . . . .

MULTI FIELD ANALYSIS STEP OPTIONS

TIME AT BEGINNING OF ANALYSIS. . . . . . . 0.0000
TIME AT END OF ANALYSIS. . . . . . . . . . 50.000
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. . . . . . 0.10000E-01

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 = 0.73380E-05
RECEIVING FORCE FY SUM =-0.15485E-03
RECEIVING FORCE FZ SUM =-0.30712E-02


*** WARNING *** CP = 12.909 TIME= 16:47:42
Element shape checking is currently inactive. Issue SHPP,ON or
SHPP,WARN to reactivate, if desired.

*** NOTE *** CP = 13.018 TIME= 16:47:42
The model data was checked and warning messages were found.
Please review output or errors file (
/..../FluidFSI_006.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 SHELL181. IT IS ASSOCIATED WITH ELASTOPLASTIC
MATERIALS ONLY. KEYOPT(8) IS ALREADY SET AS SUGGESTED. KEYOPT(3)=2
IS SUGGESTED FOR HIGHER ACCURACY OF MEMBRANE STRESSES; OTHERWISE,
KEYOPT(3)=0 IS SUGGESTED. KEYOPT(3) CAN NOT BE RESET HERE. PLEASE RESET
IT MANUALLY IF NECESSARY.



*** WARNING *** CP = 13.078 TIME= 16:47:42
A check of your model data produced 1 warnings.
Should the SOLV command be executed? [y/n]

*** NOTE *** CP = 13.080 TIME= 16:47:42
*** The SOLVE command aborted ***

SOLU_LS1:

WRITE ALL COMPONENTS TO THE COMPONENTS FILE.
START WRITING AT THE BEGINNING OF FILE ANSYS.cm

COMPONENTS WERE WRITTEN TO FILE= ANSYS.cm

SOLU_LS1:

FINISH SOLUTION PROCESSING


***** ROUTINE COMPLETED ***** CP = 13.083



*** NOTE *** CP = 13.083 TIME= 16:47:42
A total of 4 warnings and errors written to
/...../FluidFSI_006.ansys/ANSYS.err.

BEGIN:

PURGE ALL SOLUTION AND POST DATA
SAVE ALL MODEL DATA

*** NOTE *** CP = 13.086 TIME= 16:47:42
NEW BACKUP FILE NAME= ANSYS.dbb.

ALL CURRENT ANSYS DATA WRITTEN TO FILE NAME= ANSYS.db
FOR POSSIBLE RESUME FROM THIS POINT


NUMBER OF WARNING MESSAGES ENCOUNTERED= 4
NUMBER OF ERROR MESSAGES ENCOUNTERED= 0

DATA INPUT WRITTEN ON /......./FluidFSI_006.ansys/ANSYS.log

+--------------------- A N S Y S S T A T I S T I C S --------------------





CFX output
+--------------------------------------------------------------------+
| Convergence History |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| Writing transient file 0_full.trn |
| Name : Transient Results 1 |
| Type : Standard |
| Option : Every Timestep |
+--------------------------------------------------------------------+

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

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

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

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver could not be started, or exited with return |
| code 255. No results file has been created. |
+--------------------------------------------------------------------+

End of solution stage.
lingdeer is offline   Reply With Quote

Old   November 6, 2011, 16:56
Default
  #8
Member
 
Elaine
Join Date: Jul 2011
Posts: 45
Rep Power: 4
lingdeer is on a distinguished road
Oh its warning not error, by the way.

Thanks!!!
lingdeer is offline   Reply With Quote

Old   November 7, 2011, 23:49
Default
  #9
Member
 
Muhammad Amir
Join Date: May 2011
Posts: 30
Rep Power: 5
solomedic is on a distinguished road
At lingdeer. Theerror you are getting is due to larg mesh displacement.you can make the run to cont, by using smaller timestep,or by making the mapped meshing.
solomedic is offline   Reply With Quote

Old   November 8, 2011, 16:47
Default
  #10
Member
 
Elaine
Join Date: Jul 2011
Posts: 45
Rep Power: 4
lingdeer is on a distinguished road
Thanks Solomedic!
Can you give me some advice on how to do the mapping? Or maybe which tutorial/guide should I look at? There are so many of them out there.
Thank you!
lingdeer is offline   Reply With Quote

Old   November 10, 2011, 06:00
Default
  #11
Senior Member
 
Matthias Voß
Join Date: Mar 2009
Location: Berlin, Germany
Posts: 393
Rep Power: 9
mvoss is on a distinguished road
What do you mean by "mapped meshing" ? Remesh after the deformation and map the data onto the new mesh?
mvoss is offline   Reply With Quote

Old   November 10, 2011, 10:27
Default
  #12
Member
 
Elaine
Join Date: Jul 2011
Posts: 45
Rep Power: 4
lingdeer is on a distinguished road
to map the mesh to the solid I guess. Either way as long as it solves my problem. Thanks!
lingdeer is offline   Reply With Quote

Old   November 16, 2011, 19:28
Default
  #13
Member
 
Elaine
Join Date: Jul 2011
Posts: 45
Rep Power: 4
lingdeer is on a distinguished road
I finally found the solution to this to suppress warning which prompt the 2way FSI simulations from another forum:

http://www.xansys.org/forum/viewtopi...ghlight=#70787

Since this problem bothered me for 2 months, I hope this will help someone else!
lingdeer is offline   Reply With Quote

Old   December 23, 2012, 00:52
Default
  #14
Nil
New Member
 
Md.
Join Date: Dec 2012
Posts: 5
Rep Power: 3
Nil is on a distinguished road
Quote:
Originally Posted by lingdeer View Post
I finally found the solution to this to suppress warning which prompt the 2way FSI simulations from another forum:

http://www.xansys.org/forum/viewtopi...ghlight=#70787

Since this problem bothered me for 2 months, I hope this will help someone else!
Hi!.I am new in FSI and I am also facing the same problem. I am trying to work on human-artery using 2-way FSI. The error I am getting is:

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

I tried the "mapped meshing" and reduced my time-steps, (0.001s), but no luck I saw your link, but I couldn't get this. My apologies for that.

I believe you have solved this problem; so would you pls suggest me how to solve this one? It is getting very frustrating for me.

Thanks!
Nil is offline   Reply With Quote

Old   December 23, 2012, 10:33
Default
  #15
Member
 
Muhammad Amir
Join Date: May 2011
Posts: 30
Rep Power: 5
solomedic is on a distinguished road
Quote:
Originally Posted by lingdeer View Post
I finally found the solution to this to suppress warning which prompt the 2way FSI simulations from another forum:

http://www.xansys.org/forum/viewtopi...ghlight=#70787

Since this problem bothered me for 2 months, I hope this will help someone else!
Can you please explain it hear, how got rid of that error?
solomedic is offline   Reply With Quote

Old   March 15, 2013, 08:07
Default Import geometery for 2way FSI
  #16
New Member
 
Simon
Join Date: Mar 2013
Posts: 2
Rep Power: 0
SimonSomething is on a distinguished road
Sorry this is a bit off topic but I could really use some help.

I'm doing a 2way FSI analysis, very similar to the example.

It works fine until I try to use my own geometry. I'm importing parasolid files from solidworks and putting them in designmodeler.

I have even tried building the exact same geometry as the example but I still always get an error when I try to solve it.

Any help would be appreciated.
SimonSomething is offline   Reply With Quote

Old   March 15, 2013, 09:42
Default
  #17
Senior Member
 
Matthias Voß
Join Date: Mar 2009
Location: Berlin, Germany
Posts: 393
Rep Power: 9
mvoss is on a distinguished road
what kind of error? maybe start a new thread...
mvoss is offline   Reply With Quote

Old   June 13, 2013, 16:44
Default To Nil
  #18
New Member
 
Join Date: Jun 2013
Location: California
Posts: 12
Rep Power: 3
faraday34 is on a distinguished road
Have you solved the problem? I would be glad if you can share it bec. I have the same error in simulating flow through a vessel.

Thank you so much

Quote:
Originally Posted by Nil View Post
Hi!.I am new in FSI and I am also facing the same problem. I am trying to work on human-artery using 2-way FSI. The error I am getting is:

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

I tried the "mapped meshing" and reduced my time-steps, (0.001s), but no luck I saw your link, but I couldn't get this. My apologies for that.

I believe you have solved this problem; so would you pls suggest me how to solve this one? It is getting very frustrating for me.

Thanks!
faraday34 is offline   Reply With Quote

Reply

Tags
ansys fsi help, cfx ansys fsi, error ansys fsi, two way fsi ansys 13, warnings fsi ansys

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fluid structure interaction jnattia Main CFD Forum 24 January 14, 2014 05:36
Transient FSI heat transfer using FLUENT and ANSYS kevpw FLUENT 0 March 26, 2010 17:04
Properly using symmetry with both CFX and ANSYS workbench for a FSI analysis, help! Cirion0000 CFX 0 July 6, 2009 14:26
FSI Transient Thermal Analysis Abduri CFX 0 December 8, 2008 20:00
FSI on a Rotating Structural Model drgolf CFX 9 August 30, 2007 12:08


All times are GMT -4. The time now is 15:31.