L. Shemer et al., EXPERIMENTS ON NONLINEAR-WAVE GROUPS IN INTERMEDIATE WATER DEPTH, Journal of waterway, port, coastal, and ocean engineering, 124(6), 1998, pp. 320-327
Evolution of nonlinear wave groups of various initial envelope shapes
is studied experimentally in a wave tank. Experiments are performed fo
r different values of the water depth in the tank. The experimental re
sults are compared with the calculations based on the cubic Schrodinge
r equation. Qualitatively different results are obtained for water dep
th values corresponding to different signs of the nonlinear term coeff
icient in the model equation. In relatively shallow water, the demodul
ation of wave groups is observed, while in a deeper water the maximum
wave height increases along the tank due to the focusing, as expected.