Numerical Simulation of Nonlinear Viscous Wavefields Generated by Piston-Type Wavemaker
Publication: Journal of Engineering Mechanics
Volume 124, Issue 10
Abstract
A numerical method for the simulation of nonlinear wavefields generated by a piston-type wavemaker has been developed by solving the unsteady, two-dimensional Navier-Stokes equations and the exact free surface boundary conditions. The Stanford University modified marker and cell method for treating the free surface has been modified to permit more accurate extrapolation of the velocity components at the free surface. Both small- and large-amplitude waves generated by a piston-type wavemaker can be simulated by the present numerical scheme, and the process of wave formation can be examined in detail. To verify the accuracy of the numerical results, the wave profiles generated by the numerical method are compared with both theoretical and experimental results. For small wave steepness, the numerical results coincide well with theoretical and experimental results. For large wave steepness, the numerical wave heights are slightly lower than the experimental ones. The characteristics of the wavefields, including the velocity fields in the flow domain, are also discussed in detail.
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Published In
Journal of Engineering Mechanics
Volume 124 • Issue 10 • October 1998
Pages: 1110 - 1120
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Oct 1, 1998
Published in print: Oct 1998
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