# Analogue gravitational field from nonlinear fluid dynamics

@inproceedings{Datta2021AnalogueGF, title={Analogue gravitational field from nonlinear fluid dynamics}, author={Satadal Datta and Uwe R. Fischer}, year={2021} }

The dynamics of sound in a fluid is intrinsically nonlinear. We derive the consequences of this fact for the analogue gravitational field experienced by sound waves, by first describing generally how the nonlinearity of the equation for phase fluctuations back-reacts onto the definition of the background providing the effective space-time metric. Subsequently, we use the the analytical tool of Riemann invariants in one-dimensional motion to derive source terms of the effective gravitational…

## One Citation

Inherent nonlinearity of fluid motion and acoustic gravitational wave memory

- PhysicsPhysical Review D
- 2022

We consider the propagation of nonlinear sound waves in a perfect fluid at rest. By employing the Riemann wave equation of nonlinear acoustics in one spatial dimension, it is shown that waves…

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