ANSYS, FLUENT, 2-way FSI with solid motion and deformation in a cubic canal

Hosein.Amiri · January 29, 2017, 07:51

Hey guys
As you can read from the title I'm asking you a question about FSI and is it possible to model a transient problem with non-rigid body motion so it could deform and have movements (displacements and velocities - with 6dof) via Transient Structural and Fluid Flow (Fluent) connected the solvers by System Coupling??

If your answer is yes, I'd say I've already done a model linked-routine like what I said, and for the sphere moving by fluid hydrodynamic forces I've only added FSI interface for it's surface but the error is :
Not enough constraints appear to prevent rigid body motion. This may..

Help me please help me..

COMSOL does this kind of simulations well but I cant lead ANSYS to an answer.

paulbr · March 29, 2017, 05:12

Hi Hosein,

I'm trying to run the same kind of simulation than you (with ANSYS) and I have to say I'm facing the same problem. Have you find any solution to enable the deformation and the displacement of your object for fsi ?

Hosein.Amiri · March 29, 2017, 06:03

Quote:

Originally Posted by paulbr

Hi Hosein,

I'm trying to run the same kind of simulation than you (with ANSYS) and I have to say I'm facing the same problem. Have you find any solution to enable the deformation and the displacement of your object for fsi ?

NOpe! not yet..

mcha · June 28, 2017, 21:47

Hi, has anyone figured out if this is possible? Thanks.

January 29, 2017, 07:51	ANSYS, FLUENT, 2-way FSI with solid motion and deformation in a cubic canal	#1
Hosein.Amiri New Member Hoseyn Amiri Join Date: Feb 2015 Posts: 2 Rep Power: 0	Hey guys As you can read from the title I'm asking you a question about FSI and is it possible to model a transient problem with non-rigid body motion so it could deform and have movements (displacements and velocities - with 6dof) via Transient Structural and Fluid Flow (Fluent) connected the solvers by System Coupling?? If your answer is yes, I'd say I've already done a model linked-routine like what I said, and for the sphere moving by fluid hydrodynamic forces I've only added FSI interface for it's surface but the error is : Not enough constraints appear to prevent rigid body motion. This may.. Help me please help me.. COMSOL does this kind of simulations well but I cant lead ANSYS to an answer.

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March 29, 2017, 05:12		#2
paulbr New Member Join Date: Mar 2017 Posts: 15 Rep Power: 9	Hi Hosein, I'm trying to run the same kind of simulation than you (with ANSYS) and I have to say I'm facing the same problem. Have you find any solution to enable the deformation and the displacement of your object for fsi ?

June 28, 2017, 21:47		#4
mcha New Member Join Date: Mar 2016 Posts: 1 Rep Power: 0	Hi, has anyone figured out if this is possible? Thanks.