We present an investigation of the resonance conditions governing triad interactions cylindrical internal waves, i.e. Kelvin modes, described by Bessel functions. Our analytical study, supported experimental measurements, is performed both in confined and unconfined axisymmetric domains. are interested two conceptual questions: can we find for a modes? What impact boundary on such resonances? I...

In this paper, we use asymptotic theory and numerical methods to study resonant triad interactions among discrete internal wave modes at a fixed frequency ( $\omega$ ) in two-dimensional, uniformly stratified shear flow. Motivated by linear generation mechanisms the ocean, assume primary field as superposition of various horizontally propagating vertical . The weakly nonlinear solution associat...