Note on modulational instability of Boussinesq wavetrains
S. Roy Choudhury1
Received03 Sept 1991
Abstract
It is demonstrated that modulational instability may occur in Boussinesq wavetrains for wavenumbers k2>1, in contrast to the result found by Shivamoggi and Debnath. Both Whitham's averaged Lagrangian formulation and the technique of Benjamin and Feir are used.