Numerical Study of the Superresonance Effect and Energy Flow in Acoustic Black Holes

We present the results of a numerical study of the superresonance effect of scalar fields incident on an acoustic black hole. We show that the superresonance effect is quite large compared with the analogous effect in a Kerr black hole. We present an explicit analysis of the energy flow from these numerical solutions to determine where the outward flow of energy originates and confirm that the superresonance effect is a real physical effect