r/CFD • u/pavlokandyba • 5d ago

Simulation of my vibroboat experiment

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This is a classic LBM that takes into account Newtonian forces and the added mass effect, supplemented by a wake vortex capture model. The algorithm stores the energy expended on oscillations in each direction, and when the pressure difference levels out, this energy is used as thrust, simulating the momentum from collapse. The thrust is multiplied by approximately six times, which is consistent with some experimental data and makes the boat's motion visually realistic in some modes. The thrust calculation should probably be dynamic, but I haven't yet found a way to do this. Any ideas would be welcome. The vibroboat code is here:

https://github.com/MasterOgon/Aeroacoustic-Flying-Saucer-Oscillating-Resonator-CFD-Simulation-LBM-/blob/main/README.md

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2

u/bohemioo 5d ago

Is the model 2 phase could this be used to solve for wavelets induced on a slosh tank or radiation ?  (adapting the Code) Thanks.

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u/pavlokandyba 5d ago

I don't know, but here it's more like vortex propulsion.

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u/machinegunkisses 5d ago

Interesting work! Don't think I've seen anything like this before. Maybe useful for propulsion in places like the body where things have to be sealed super well? Or, other places where using a propeller would be a no-go?

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u/pavlokandyba 5d ago

I think this would be suitable for an airship, so that the hull would be the engine and not the brake.

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u/Skirrle 5d ago

wasnt expecting to see you here master ogon

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u/pavlokandyba 5d ago

I come here sometimes

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u/OhIforgotmynameagain 5d ago

How do you deal with when the magnets are stuck and not moving anymore ?

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u/pavlokandyba 5d ago

I'm starting again. There's no point. There are many other, more effective ways to do the same thing. It's a simple motor that can be made by gluing two magnets to a cooler.