118 citations · 253 across the 5 of their papers we have counts for
5 papers
Analog of Superradiance effect in BEC
Soumen Basak
We investigate the scattering of phase oscillation of Bose-Einstein Condensate by a 'draining of bathtub' type fluid motion. We derive a relation between the reflection and transmi…
Sound Wave in Vortex with Sink
Soumen Basak
Using Komar's definition, we give expressions for the mass and angular momentum of a rotating acoustic black hole. We show that the mass and angular momentum so defined, obey the e…
Reflection coefficient for superresonant scattering
Soumen Basak, Parthasarathi Majumdar
We investigate superresonant scattering of acoustic disturbances from a rotating acoustic black hole in the low frequency range. We derive an expression for the reflection coeffici…
`Superresonance' from a rotating acoustic black hole
Soumen Basak, Parthasarathi Majumdar
Using the analogy between a shrinking fluid vortex (`draining bathtub'), modelled as a (2+1) dimensional fluid flow with a sink at the origin, and a rotating (2+1) dimensional blac…
Burst dynamics during drainage displacements in porous media: Simulations and experiments
Eyvind Aker, Knut Jorgen Maloy, Alex Hansen +1
We investigate the burst dynamics during drainage going from low to high injection rate at various fluid viscosities. The bursts are identified as pressure drops in the pressure si…