Analytical Approximation in Deep Water Waves

Title & Authors
Analytical Approximation in Deep Water Waves
Shin, JangRyong;

Abstract
The objective of this paper is to present an analytical solution in deep water waves and verify the validity of the theory (Shin, 2015). Hence this is a follow-up to Shin (2015). Instead of a variational approach, another approach was considered for a more accurate assessment in this study. The products of two coefficients were not neglected in this study. The two wave profiles from the KFSBC and DFSBC were evaluated at N discrete points on the free-surface, and the combination coefficients were determined for when the two curves pass the discrete points. Thus, the solution satisfies the differential equation (DE), bottom boundary condition (BBC), and the kinematic free surface boundary condition (KFSBC) exactly. The error in the dynamic free surface boundary condition (DFSBC) is less than 0.003%. The wave theory was simplified based on the assumption tanh $\small{D{\approx}1}$ in this paper. Unlike the perturbation method, the results are possible for steep waves and can be calculated without iteration. The result is very simple compared to the 5th Stokes` theory. Stokes` breaking-wave criterion has been checked in this study.
Keywords
Nonlinear progressive water waves;Breaking waves;Breaking limit;Non-linear free surface boundary condition;Stokes criterion;Deep water waves;
Language
English
Cited by
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