Theory and Calculation of the Nonlinear Energy Transfer between Sea Waves in Deep Water.

Abstract : A procedure to integrate the energy transfer Boltzmann integrals has been set up by Webb using Hasselmann's theoretical development for the nonlinear wave-wave interactions between sea waves. This report discusses how the integration process has been made simpler and more efficient by the utilization of a geometrically spaced polar grid over the spectral region. This grid allows the loci and the coefficients inside the integrand to scale by various multiples of the geometric scaling factor. Numerical results for the nonlinear energy transfer are given for various spectra. (Author)