Learning Forum

[Samina]

Hello dear expert,

I am going to model a moving rigid vortex generator that moves adjacent to the top wall of a backward-facing step.

Starting with a simple simulation, I want to model a rectangular fin.

I am using ANSYS Fluent to solve the fluid domain. When I draw the geometry, I make two parts, one solid and a fluid.

[Rob]

Is it moving along the wall (eg a scraper) or vibrating (ie bending in the flow)?

[Samina]

It is moving along the wall with a given sinusoidal velocity.

[Rob]

OK, so a scraper. I'd use layering and non-conformal interface zones. You may need to model the wall as a solid if it need a thickness.

[Samina]

Thanks for your answer.
I have surfed the net to understand how to define non-conformal interface zones, but it seems to be practical for two or more adjacent zones that are meshed separately, so we should define their interface boundaries as non-conformal. However, In my case, the solid part is a rigid body and does not require to have any mesh. What should I do in this case?

[Rob]

You may need to rethink the meshing approach to define the shape and then allow it to move. Most modelling needs some planning to set up the geometry & mesh to then use the solver tools.

[Samina]

Thanks for your guidance. I will reconsider the whole approach.