3-D simulations of freak waves based on high-order spectral method  

作　　者：赵西增 孙昭晨 梁书秀 

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology [2]RIAM,Kyushu University

出　　处：《Journal of Harbin Institute of Technology(New Series)》2010年第2期286-291,共6页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China (Grant No. 50779004)

摘　　要：Three-dimensional ( 3-D) directional wave focusing is one of the mechanisms that contribute to the generation of freak waves. To simulate and analyze this phenomenon,a 3-D wave focusing model is proposed based on the enhanced high-order spectral method,which solves the fully nonlinear potential flow equations with a free surface within periodic unbounded 3-D domains. The numerical model is validated against a fifth-order Stokes solution for regular waves. Laboratory-scale freak waves are observed with wave components having equal amplitudes. Investigations of the appearance and propagation of freak-wave events in a 3-D open wavefield defined by a directional wave spectrum are then realized.Three-dimensional （3-D） directional wave focusing is one of the mechanisms that contribute to the generation of freak waves. To simulate and analyze this phenomenon, a 3-D wave focusing model is proposed based on the enhanced high-order spectral method, which solves the fully nonlinear potential flow equations with a free surface within periodic unbounded 3-D domains. The numerical model is validated against a fifth-order Stokes solution for regular waves. Laboratory-scale freak waves are observed with wave components having equal amplitudes. Investigations of the appearance and propagation of freak-wave events in a 3-D open wavefield defined by a directional wave spectrum are then realized.

关 键 词：freak wave high order spectral method directional spectrum wave focusing wave model 

分 类 号：O353.2[理学—流体力学]