Learning Forum

[Inims]

Hello Good People,

 

Anyone out there can least methodology for carrying out Vortex Induced Vibration on a pipe structure?

Please kindly be of support.

 

Thanks

 

[cfd_learner]

Explain and sketch your problem. Read Blevins book on FIV.

[José Mantovani]

Last year I wrote an article about the Von Karman Street Vortex effect, but I just commented on the possible events that this effect may have. The Tacoma Narrows bridge, according to some literature, its fault is described from an induction of vibration through the formation of vortices by the passage of air in its structure.

However, the article I just wrote made a comment, I just did the CFD. Interestingly, you do a CFD simulation of vortex formation in a desired structure and use the FSI to calculate the stresses from the previous flow.

 

Regards,

 

Mantovani. 

[raul.raghav]

VIV on a deformable structure will require a two-way couple FSI simulation setup. If the structure is rigid and the deformation is not critical aspect of the investigation, you can simplify the problem by using the "Six-DOF" option in the "Dynamic Mesh" tab of Ansys Fluent. Fluent also offers the "Overset Mesh" feature which will help you set the simulation. The mass and moment of inertia properties are defined by an UDF. If the motion is restrained to a particular direction and if there is no rotation of the body, you can constraint the 6-DOF using an UDF. You might also need the "Implicit Update" option in the Dynamic Mesh tab to help achieve convergence.

General advice: Start with a 2D case before moving on to the 3D case. Consider a rigid body motion before proceeding with the Six-DOF model.

[Inims]

I will start with 2D like you suggested