Experiment confirms long-predicted Kelvin-wave turbulence in water tanks

Physicists have long predicted that the wobbles and twists in the narrow core of a draining whirlpool can evolve into a specific form of turbulence known as "Kelvin-wave turbulence." This phenomenon was theorized to involve the transfer of energy from large ripples to progressively smaller scales, a process that had remained unverified in experimental settings for nearly 150 years.

Researchers have now successfully observed this predicted wave turbulence directly within a water tank. This experimental confirmation provides the first direct evidence of the energy cascade in whirlpool dynamics that has been anticipated by the physics community for more than a century.