# user defined function in Transient Structural for FSI problem

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 November 23, 2011, 08:41 user defined function in Transient Structural for FSI problem #1 Member   omid Join Date: Apr 2011 Posts: 98 Rep Power: 6 Hi all I'm trying to simulate 2-way FSI problem. Can i define an user function to access to the tension of solid domain? in my problem i need to set tension of solid to zero after each coupling time step. i can do it by Abaqus but a don't know how can do it by ansys workbench. Best regards.

 November 24, 2011, 10:45 #2 Senior Member   Join Date: Apr 2009 Posts: 511 Rep Power: 12 Do you mean you want to reset the stress/displacements to zero? What's the big picture here? Why do you want to do that?

 December 2, 2011, 08:23 #3 Member   omid Join Date: Apr 2011 Posts: 98 Rep Power: 6 Thanks for reply Stumpy In this problem, in the solid body in each coupling step, any energy will not store. in other hand the displacement of solid body in each coupling step most be independent of the stress store in it from last coupling step. i like to simulate the displacement of solid part due to pressure distribution in each coupling step. Best regards.

 December 2, 2011, 17:51 #4 Senior Member   Join Date: Apr 2009 Posts: 511 Rep Power: 12 If I understand correctly, then you want the structural solution at each coupling step to be independent of the solution history. So like a series of static structural solutions based on your transient CFD results. Is that correct? This must be a 1-way analysis then? If so, then just turn off Time Integration in Mechanical.

 December 3, 2011, 03:32 #5 Member   omid Join Date: Apr 2011 Posts: 98 Rep Power: 6 yes I want the structural solution at each coupling step to be independent of the solution history. But in each coupling step the displacement of solid most calculated and transfer to fluid part, like 2-way FSi. Is that true with just urn off Time Integration in Mechanical i can do it? Best regards

 December 5, 2011, 12:19 #6 Senior Member   Join Date: Apr 2009 Posts: 511 Rep Power: 12 Yes, if you turn off Time Integration then you get a steady-state structural solution at each coupling step (and at each coupling iteration) and the displacements are still passed to the CFD side.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post coolio CD-adapco 3 December 21, 2011 18:13 asaijo OpenFOAM Installation 9 April 6, 2011 12:21 jens_klostermann OpenFOAM Bugs 11 June 28, 2007 17:51 ereiss FLUENT 1 July 8, 2004 16:10 alice FLUENT 3 December 13, 2000 01:10

All times are GMT -4. The time now is 23:14.

 Contact Us - CFD Online - Top