FSI in Ansys 14 workbench

arun7328 · February 1, 2013, 10:09

Hi ALL,

I have just started my Phd in FSI regarding hydroelasticity of ships. The main concern is to establish a 2 way coupling between CFD(RANS) and ANSYS. So while going through the workbench i had a major doubt. This could be a little silly but hope you could guide me.

I am using ANSYS 14 in the uni and i understand it is possible to do a 2 way coupling using FLUENT.While going through the steps i saw that once the 2 analysis system are launched and coupled the geometries are also linked. This is so that they are updated together right? In my case i think i will have to set up the geometry and meshing in ICEM as the meshing tool in DM is not so good, and then i can export to fluent. But if i import a mesh after that in the FLUENT analysis system the geometry link is gone and only the setup link shows. Is this Ok when i am doing a 2 way coupling? I mean is it necessary that i have to explicitly use the geometry and meshing in the Fluent workbench analysis tool or can i use any software for meshing and later load it?

I am yet to read the manuals completely but before doing that and finding that i can't if you could guide me, i would be able to save a lot of time.

Thanks
Regards
Arun

arun7328 · February 3, 2013, 09:25

can someone please give me some suggestions?

stumpy · February 13, 2013, 15:45

The geometry cell do not have to be linked. You can use ICEM for the Fluent mesh. All that matters is that the FSI interface in the initial structural and fluid mesh match in physical space (the meshes don't need node matching, just geometric matching).

arun7328 · February 13, 2013, 17:16

Thank you..

SimonSomething · March 15, 2013, 06:33

I'm working on a 2 way FSI model in Ansys workbench with CFX, very similar to the tutorial of the oscillating plate.

The solution works fine until I put my own geometry in. I exported the Parasolid files from Solidworks and put them in designmodeler. I have even tried rebuilding the geometry from the tutorial but I always get an error when I try to solve it.

Any sugestion?
Would really appreciate some help on this.

stumpy · March 15, 2013, 15:46

Try the CFX Forum, this one is for Fluent.

zzura · May 9, 2013, 03:46

May I know where can I have a manual or tutorial on using the FSI method in ansys 14?
I'm beginner in CFD world..huhu

February 1, 2013, 10:09	FSI in Ansys 14 workbench	#1
arun7328 Member Arun Krishnan.L.H Join Date: Jan 2013 Posts: 75 Rep Power: 13	Hi ALL, I have just started my Phd in FSI regarding hydroelasticity of ships. The main concern is to establish a 2 way coupling between CFD(RANS) and ANSYS. So while going through the workbench i had a major doubt. This could be a little silly but hope you could guide me. I am using ANSYS 14 in the uni and i understand it is possible to do a 2 way coupling using FLUENT.While going through the steps i saw that once the 2 analysis system are launched and coupled the geometries are also linked. This is so that they are updated together right? In my case i think i will have to set up the geometry and meshing in ICEM as the meshing tool in DM is not so good, and then i can export to fluent. But if i import a mesh after that in the FLUENT analysis system the geometry link is gone and only the setup link shows. Is this Ok when i am doing a 2 way coupling? I mean is it necessary that i have to explicitly use the geometry and meshing in the Fluent workbench analysis tool or can i use any software for meshing and later load it? I am yet to read the manuals completely but before doing that and finding that i can't if you could guide me, i would be able to save a lot of time. Thanks Regards Arun

February 3, 2013, 09:25		#2
arun7328 Member Arun Krishnan.L.H Join Date: Jan 2013 Posts: 75 Rep Power: 13	can someone please give me some suggestions? Last edited by arun7328; February 3, 2013 at 13:02.

March 15, 2013, 06:33	Import geometery for 2way FSI	#5
SimonSomething New Member Simon Join Date: Mar 2013 Posts: 2 Rep Power: 0	I'm working on a 2 way FSI model in Ansys workbench with CFX, very similar to the tutorial of the oscillating plate. The solution works fine until I put my own geometry in. I exported the Parasolid files from Solidworks and put them in designmodeler. I have even tried rebuilding the geometry from the tutorial but I always get an error when I try to solve it. Any sugestion? Would really appreciate some help on this.

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February 13, 2013, 15:45		#3
stumpy Senior Member Join Date: Apr 2009 Posts: 531 Rep Power: 21	The geometry cell do not have to be linked. You can use ICEM for the Fluent mesh. All that matters is that the FSI interface in the initial structural and fluid mesh match in physical space (the meshes don't need node matching, just geometric matching).

February 13, 2013, 17:16		#4
arun7328 Member Arun Krishnan.L.H Join Date: Jan 2013 Posts: 75 Rep Power: 13	Thank you..

March 15, 2013, 15:46		#6
stumpy Senior Member Join Date: Apr 2009 Posts: 531 Rep Power: 21	Try the CFX Forum, this one is for Fluent.

May 9, 2013, 03:46		#7
zzura New Member Join Date: May 2013 Posts: 4 Rep Power: 12	May I know where can I have a manual or tutorial on using the FSI method in ansys 14? I'm beginner in CFD world..huhu