ANSYS and CFX not talking in two-way FSI?

brashear · January 27, 2011, 03:16

Hi,
I get the following error when I try to update my CFX-Pre:

In Analysis 'Flow Analysis 1' - Analysis Type: The specified Mechanical Input File 'ds.dat' can not be found or does not contain any valid interfaces. Specify an input file with valid interfaces, update the file location if it has moved or set the External Solver Coupling option to "ANSYS MultiField via Prep7".

I started the FSI analysis by starting an ANSYS transient analysis, which I confirmed to be solvable by itself. Then I deleted the results then to "Transfer Data to New -> Fluid Flow (CFX)" from the setup. I defined my fluid-structure interface loads in ANSYS.

I tried pointing manually to the 'ds.dat' file under dir\dp0\SYS\MECH\ds.dat, but the same error results.

Any thoughts?

Thanks

stumpy · January 31, 2011, 11:17

In the Project Schematic delete the link between the ANSYS Setup cell and the CFX Setup cell, then re-create it and refresh CFX-Pre. That usually fixes this problem for me.

et1ap2 · May 5, 2012, 07:32

Hi,

I have the same problem as brashear. I tried to delete and re-create the link between setup cells of ANSYS and CFX, but the error still exists

Do you have any other suggestions? Thanks in advance

sajad_abasi · May 5, 2012, 10:49

hi
i had this problem too.but i saved it in this manner and closed workbench after that i open it again and it works right.
sometimes you should specify the file path yourself for the software

hope to help you

Gweher · May 5, 2012, 22:17

As Stumpy said it should work (always does for me).

If not I think you should try, >Project Directory\dp0\CFX\CFX, and use the ./ds in CFX so you have no issues when changing the project directory path.

Alanseu · June 13, 2012, 05:15

Actually it is the missing of FSIN_No# in defining the boundary of Interface of fluid and solid in CFX-re, which cause the ds.dat cannot been found or others.

SteelMan · November 25, 2012, 08:13

I met the same problem. I copied the ds.dat into the target folder from an old project and it works. I checked the contents of the file(ds.dat )and it was updated according to new project.

January 27, 2011, 03:16	ANSYS and CFX not talking in two-way FSI?	#1
brashear New Member Donald Brashear Join Date: Jan 2011 Posts: 3 Rep Power: 15	Hi, I get the following error when I try to update my CFX-Pre: In Analysis 'Flow Analysis 1' - Analysis Type: The specified Mechanical Input File 'ds.dat' can not be found or does not contain any valid interfaces. Specify an input file with valid interfaces, update the file location if it has moved or set the External Solver Coupling option to "ANSYS MultiField via Prep7". I started the FSI analysis by starting an ANSYS transient analysis, which I confirmed to be solvable by itself. Then I deleted the results then to "Transfer Data to New -> Fluid Flow (CFX)" from the setup. I defined my fluid-structure interface loads in ANSYS. I tried pointing manually to the 'ds.dat' file under dir\dp0\SYS\MECH\ds.dat, but the same error results. Any thoughts? Thanks

May 5, 2012, 07:32		#3
et1ap2 New Member Ivailo Rusev Join Date: May 2012 Posts: 4 Rep Power: 13	Hi, I have the same problem as brashear. I tried to delete and re-create the link between setup cells of ANSYS and CFX, but the error still exists Do you have any other suggestions? Thanks in advance Last edited by et1ap2; May 5, 2012 at 08:09.

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January 31, 2011, 11:17		#2
stumpy Senior Member Join Date: Apr 2009 Posts: 531 Rep Power: 21	In the Project Schematic delete the link between the ANSYS Setup cell and the CFX Setup cell, then re-create it and refresh CFX-Pre. That usually fixes this problem for me.

May 5, 2012, 10:49		#4
sajad_abasi Member sajad Join Date: Nov 2010 Posts: 51 Rep Power: 15	hi i had this problem too.but i saved it in this manner and closed workbench after that i open it again and it works right. sometimes you should specify the file path yourself for the software hope to help you

May 5, 2012, 22:17		#5
Gweher Senior Member Gwenael H. Join Date: Mar 2011 Location: Switzerland Posts: 392 Rep Power: 20	As Stumpy said it should work (always does for me). If not I think you should try, >Project Directory\dp0\CFX\CFX, and use the ./ds in CFX so you have no issues when changing the project directory path.

June 13, 2012, 05:15		#6
Alanseu New Member Wei Zhao Join Date: Apr 2011 Posts: 9 Rep Power: 15	Actually it is the missing of FSIN_No# in defining the boundary of Interface of fluid and solid in CFX-re, which cause the ds.dat cannot been found or others.

November 25, 2012, 08:13		#7
SteelMan New Member Join Date: Nov 2012 Location: China Posts: 3 Rep Power: 13	I met the same problem. I copied the ds.dat into the target folder from an old project and it works. I checked the contents of the file(ds.dat )and it was updated according to new project.