Presented by:
Onno Bokhove University of Leeds
Date:
Wednesday 24th July 2019 - 15:00 to 16:00
Venue:
INI Seminar Room 1
Event:
Abstract:
Amplification phenomena in a so-called
bore-soliton-splash have led us to develop a novel wave-energy device with wave
amplification in a contraction used to enhance wave-activated buoy motion and
magnetically-induced energy generation.
An experimental proof-of-principle shows that our
wave-energy device works.
Most importantly, we develop a novel wave-to-wire
mathematical model of the combined wave hydrodynamics, wave-activated buoy
motion and electric power generation by magnetic induction, from first principles,
satisfying one grand variational principle in its conservative limit.
Wave and buoy dynamics are coupled via a Lagrange
multiplier, which boundary value at the waterline is subtly solved explicitly
by imposing incompressibility in a weak sense.
Dissipative features, such as electrical wire resistance
and nonlinear LED-loads, are added a posteriori.
New is also the intricate and compatible (finite-element)
space-time discretisation of the linearised dynamics, guaranteeing numerical
stability and the correct energy transfer between the three subsystems.
Preliminary simulations of our simplified and linearised
wave-energy model are encouraging, yet suboptimal, and involve a first study of
the resonant behaviour and parameter dependence of the device.
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