Hydrodynamic simulations of rotating black holes

TL;DR

This paper explores the analogy between vortex flows in fluids and rotating black holes, investigating wave phenomena like light-bending and superradiance through theoretical and experimental methods, highlighting universality in physics.

Contribution

It provides a combined theoretical and experimental study of wave scattering around vortex flows, strengthening the analogy with rotating black holes and exploring dispersive effects.

Findings

Vortex flows mimic rotating black hole phenomena

Experimental evidence of superradiance in fluid systems

Dispersive effects influence wave scattering processes

Abstract

Wave scattering phenomena are ubiquitous in almost all Sciences, from Biology to Physics. Interestingly, it has been shown many times that different physical systems are the stage to the same processes. The discoveries of such analogies have resulted in a better understanding of Physics and are indications of the universality of Nature. One stunning example is the observation that waves propagating on a flowing fluid effectively experience the presence of a curved space-time. In this thesis we will use this analogy to investigate, both theoretically and experimentally, fundamental effects occurring around vortex flows and rotating black holes. In particular, we will focus on light-bending, superradiance scattering, and quasi-normal modes emission. The experimental nature of this work will lead us to study these processes in the presence of dispersive effects. Our results strengthen the link between vortices and rotating black holes and open up new challenges to be addressed in the future.