Learning Forum

[rnegrete]

I have a buoy with a piston on top of it. The piston has a rack and pinion system and I want to connect the pinion to an electromagnetic induction device to generate energy. I have setup a coupled analysis where a wave in Fluent moves the buoy, and in Mechanical the rack, which is fixed to the piston, moves the pinion or gear. If I run the simulation, the hydrostatic equilibrium (flotation line) of the buoy occurs when there's enough energy to lift the piston and move the pinion. If I attached an electromagnetic induction device to the pinion, there would be more energy required from the system to move it and the buoy would be submerged more. Intuitively I know that if it's submerged more, the force going up would be more but I want to fully understand how much more would it submerge, how far with the piston travel up and down, the force on buoy, the piston, the pinion and the induction device going up and down, and how much energy can I make going on the entire oscillation.

Many thanks

[Erik Kostson]

 

Hi

Perhaps the new capability allowing to connect AQWA (hydrodynamics) and Rigid Body dynamics can be used here (can not help much more here) – perhaps other forum members that have used this can provide some more feedback.

Some info here:

https://innovationspace.ansys.com/forum/forums/topic/aqwa-and-rigid-dynamic-co-simulation/

 

Erik

 

[rnegrete]

Thank you Erik. 

I will look into it. in the meantime... are any of these options viable?

• Making a 3 way system coupling simulation Fluent - Mechanical - Maxwell?
• Using the electric or electric/heat analysis systems whithin mechanical to provide the opposing force?
• Setting some variable force acting against buoyancy that's proportional to buoyancy iteslf in mechanical? How could that be done? What's the formula for that?

Outside of Ansys, how can this be solved using formulas? preferably by timesteps, but a complete cycle would also shed some light into my analysis.

BR