Abstract
Capillary gravity waves excited by an obstacle are investigated numerically. Navier-Stokes (or Euler) equations are solved under the resonant condition for which the large-amplitude solitary waves are generated. It is found that the large-amplitude nonlinear waves often generate short waves both in the upstream and downstream of the obstacle under the action of capillary effects. These short waves interact with another nonlinear wave in a long time. Comparison of the results with the weakly nonlinear theories reveals that the theories are applicable to the cases with strong capillary effects.
