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March 17, 2022 at 3:46 am
yuanyangq
SubscriberHi everyone,
I have a 3d foil geometry and I want to run a FSI simulation with foil moving under pre-described motion law to calculate the hydrodynamic forces acting on the foil.
Now I know how to make it flap as a rigid body in fluent, and do 2 way FSI simulation with a stationary foil, but I don't know how to do both at the same time. Can anyone tell me how to do it or any recommended references/tutorials? Thanks!
March 17, 2022 at 11:48 amRob
Forum ModeratorIf you're not bending the foil I'd look at just setting the motion up in Fluent. Is the foil rotating above an axis or flapping?
March 17, 2022 at 6:18 pmyuanyangq
SubscriberIt flaps. The material is soft, so it is supposed to deform while it flaps in incompressible flow. The problem is I dont know how to set up the system coupling of Fluent and Mechanical, while also make it flap using UDF. I can do these two things separately though.
March 18, 2022 at 9:35 amRob
Forum ModeratorOK, probably one for You may find the Fluent intrinsic FSI to be better for this depending on how floppy/bendy the flap is.
March 18, 2022 at 9:44 amyuanyangq
SubscriberThank you, I havent paid attention to the fluent intrinsic FSI
March 23, 2022 at 2:45 pmSteve
Ansys EmployeeThere are a few options here to prescribe the motion of the foil.
Use System Coupling to couple Fluent and Mechanical in a 1-way FSI where displacement is passed from Mechanical to Fluent. The motion is prescribed in Mechanical. For this you could use an applied force, pressure, or displacement. An example of a force applied on the Mechanical side is shown in this tutorial: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/sysc_tut/sysc_tut_oscplate_export_cfx.html
Use Fluent only and specify the shape of the foil with the following UDF. This may be more https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/flu_udf/flu_udf_sec_define_grid_motion.html
Steve
Viewing 5 reply threads- The topic ‘How to do 2 way fsi of a soft flapping foil?’ is closed to new replies.
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