Learning Forum

[Asahel Marinelarena-Diaz]

As part of my research, I'm currently trying to simulate different kinds of objects (Washer, Plastic Cap, Nut, Bolt, etc) being pushed across a pipe system from Inlet to Outlet. I'm no expert withint Ansys Fluent, so far I've been able to create simulations where I place the object (stationary) and observe the velocity and pressure contours along with the velocity streamlines that are generated with an initial velocity as a boundary condition. But every simulation has been only with the object being static.

I would appreaciate if someone could guide me on the right approach for generating a dynamic simulation where the object moves alongside the fluid flow and reaches the outlet. I want to also evaluate the mass flow rate differential that this object may be causing to the system. (Approximate how much restriction/obstruction is the object generating).

Thank you in advance!

 

[Rob]

Options include moving deforming mesh (6DOF & collision detection), overset (also using 6DOF & collision detection) and possibly Rocky. None of those are going to be particularly easy, so review the effect on flow rate in a static case until you have a better idea of what/why you want to model. 

[Asahel Marinelarena-Diaz]

Could you briefly explain how to setup those simulations? or provide a tutorial? I want to move forward to simulating a dynamic movement of the object across the fluid.

[Rob]

There's the moving mesh tutorial in Fluent's Help using overset. You'd need to add in the contact (collision) detection, and that's covered in the UDF manual   https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v241/en/flu_udf/flu_udf_DynamicMeshDEFINE.html%23flu_udf_sec_define_contact

Otherwise, I'm not aware of examples and the cases I've had passing involvement with are all confidential.