No convergence method available in ANYS FSI problems?

acasas · May 10, 2013, 08:54

Hi , I can´t add a convergence method on a FSI problem. A pressure solution from CFX fluid analisis is beeing aplyied over a wing shaped structure as a load. When I try to add the convergence method under solution options in mechanical workbench, this option is not availabe.
If I do supress the imported pressure, and add a simple force load on the tip of the wing shaped structure, then this option is available and I can use this convergence method.
Can someone tell me why?
Thank´s a lot

Far · May 10, 2013, 09:10

http://www.cfd-online.com/Forums/ans...workbench.html

acasas · May 10, 2013, 09:28

mmm, don´t understand. Why 2 way? i´ts 1 way in my case.
thank´s

acasas · May 10, 2013, 09:32

by the way, I see my post have been moved. How to find where? And why it´s beeing moved? I have posted under Ansys forum directory, isn´t the right way to do it?
Thank´s

Far · May 10, 2013, 10:02

acasas: Your thread has been moved to CFX forum for one week. Here you will meet wonderful people who are expert in FSI with CFX specially Glenn.

ghorrocks · May 11, 2013, 00:53

Sorry, I am no expert on FSI. In fact I will admit that I have never done an FSI simulation with CFX as I do not need to in my line of work

But I do know a little about CFD and numerical methods in general and many of the questions asked are simple enough for that.

acasas · May 11, 2013, 05:46

Sad for me.
Where can I find help for this? Any suggestion?

Far · May 11, 2013, 05:53

I am sending you some tuts on FSI using CFX. Hope it will help you.

uploading will take some time around 12-14 hrs

acasas · May 11, 2013, 06:14

Hi Sijal. Thanks for it.
I do more or less know how to solve a FSI 1 way problem.
But as I told you, my problem now is inside mechanical workbench. If I do apply a pressure solution as a load to my structure, I CAN get the stress over it with no problem. However if I try to use the convergence method for a better automatic mesh refinement on the higly stressed areas, this option does NOT show up. Instead, if I do apply a simple force on the tip of my wing shaped structure and supress the imported pressure, the convergence option does show up.
Any suggestion?
Thank´s

Far · May 11, 2013, 06:50

What do you mean by convergence?

http://www.padtinc.com/blog/the-focu...al-information

Far · May 12, 2013, 15:29

downloaded files?

acasas · May 12, 2013, 15:39

Hey Sijal!

Just downloading right now. thank´s

May 10, 2013, 08:54	No convergence method available in ANYS FSI problems?	#1
acasas Member Antonio Casas Join Date: May 2013 Location: world Posts: 85 Rep Power: 13	Hi , I can´t add a convergence method on a FSI problem. A pressure solution from CFX fluid analisis is beeing aplyied over a wing shaped structure as a load. When I try to add the convergence method under solution options in mechanical workbench, this option is not availabe. If I do supress the imported pressure, and add a simple force load on the tip of the wing shaped structure, then this option is available and I can use this convergence method. Can someone tell me why? Thank´s a lot

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
force convergence problems in CFX 6DOF rigid body solver	ajay_ks	CFX	8	March 25, 2013 05:02
Implicit method of FSI	cjtune	Siemens	0	March 12, 2003 13:07
convergence problems	david aquilina	Siemens	4	October 27, 2000 10:18
convergence acceleration by preconditioning method	Atit Koonsrisuk	Main CFD Forum	4	June 5, 2000 07:21
Has the pressure correction method problems?	X. Ye	Main CFD Forum	17	September 1, 1999 17:14

May 10, 2013, 09:10		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	http://www.cfd-online.com/Forums/ans...workbench.html

May 10, 2013, 09:28		#3
acasas Member Antonio Casas Join Date: May 2013 Location: world Posts: 85 Rep Power: 13	mmm, don´t understand. Why 2 way? i´ts 1 way in my case. thank´s

May 10, 2013, 09:32		#4
acasas Member Antonio Casas Join Date: May 2013 Location: world Posts: 85 Rep Power: 13	by the way, I see my post have been moved. How to find where? And why it´s beeing moved? I have posted under Ansys forum directory, isn´t the right way to do it? Thank´s

May 10, 2013, 10:02		#5
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	acasas: Your thread has been moved to CFX forum for one week. Here you will meet wonderful people who are expert in FSI with CFX specially Glenn.

May 11, 2013, 00:53		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Sorry, I am no expert on FSI. In fact I will admit that I have never done an FSI simulation with CFX as I do not need to in my line of work But I do know a little about CFD and numerical methods in general and many of the questions asked are simple enough for that.

May 11, 2013, 05:46		#7
acasas Member Antonio Casas Join Date: May 2013 Location: world Posts: 85 Rep Power: 13	Sad for me. Where can I find help for this? Any suggestion?

May 11, 2013, 05:53		#8
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	I am sending you some tuts on FSI using CFX. Hope it will help you. uploading will take some time around 12-14 hrs

May 11, 2013, 06:14		#9
acasas Member Antonio Casas Join Date: May 2013 Location: world Posts: 85 Rep Power: 13	Hi Sijal. Thanks for it. I do more or less know how to solve a FSI 1 way problem. But as I told you, my problem now is inside mechanical workbench. If I do apply a pressure solution as a load to my structure, I CAN get the stress over it with no problem. However if I try to use the convergence method for a better automatic mesh refinement on the higly stressed areas, this option does NOT show up. Instead, if I do apply a simple force on the tip of my wing shaped structure and supress the imported pressure, the convergence option does show up. Any suggestion? Thank´s

May 11, 2013, 06:50		#10
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	What do you mean by convergence? http://www.padtinc.com/blog/the-focu...al-information

May 12, 2013, 15:29		#11
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	downloaded files?

May 12, 2013, 15:39		#12
acasas Member Antonio Casas Join Date: May 2013 Location: world Posts: 85 Rep Power: 13	Hey Sijal! Just downloading right now. thank´s