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Indexed by:期刊论文

Date of Publication:2009-01-01

Journal:ACTA OCEANOLOGICA SINICA

Included Journals:SCIE、CSCD、Scopus

Volume:28

Issue:3

Page Number:75-81

ISSN No.:0253-505X

Key Words:numerical wave tank; image Green function; higher-order boundary element method; fully nonlinear; extreme wave

Abstract:A fully nonlinear numerical model based on a time-domain higher-order boundary element method (HOBEM) is founded to simulate the kinematics of extreme waves. In the model, the fully nonlinear free surface boundary conditions are satisfied and a semi-mixed Euler-Lagrange method is used to track free surface; a fourth-order Runga-Kutta technique is adopted to refresh the wave elevation and velocity potential on the free surface at each time step-, air image Green function is used ill the numerical wave tank so that the integrations oil the lateral surfaces and bottom are excluded. The extreme waves are generated by tire method of wave focusing. The physical experiments are carried out in a wave flume. On the horizontal velocity of the measured point, numerical solutions agree well with experimental results. The characteristics of the nonlinear extreme-wave kinematics and the velocity distribution are studied here.