随机波浪作用下近岸波流场的数值模拟  

NUMERICAL SIMULATION OF RANDOM WAVE-INDUCED NEAR-SHORE CURRENTS

作　　者：唐军[1] 沈永明[1] 崔雷[1] 郑永红[2] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116023 [2]中国科学院青岛生物能源与过程研究所,青岛266071

出　　处：《力学学报》2008年第4期455-463,共9页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家重点基础研究发展计划项目(2005CB724202);国家自然科学基金项目(50709004，50779006);高等学校博士学科点专项科研基金课题(20070141032)资助~~

摘　　要：结合近岸波浪抛物型缓坡模型和近岸波流场模型,对近岸不规则波浪及其破碎后所产生的流场进行了数值模拟.在不规则波浪场的模拟中,采用JONSWAP波浪谱对入射单向不规则波浪要素按等分频率法进行离散,应用考虑波浪不规则性和破碎效应的抛物型缓坡方程对波浪场进行数值模拟,并基于抛物型缓坡方程中的波浪势函数等参数计算波浪辐射应力,以波浪辐射应力为主要动力因素基于近岸流数学模型对近岸波浪破碎所产生的近岸流场进行数值模拟,并对数值模拟结果进行了验证.模拟结果表明该模型可有效地用于研究波浪破碎产生的近岸波流场.Near-shore currents induced by the irregular water waves and their breaking were numerically simulated based on the parabolic mild slope equation and near-shore current model. The unidirectional incident irregular wave was first put into being discrete with the Jonswap wave spectrum and then simulated using the parabolic mild slope equation to obtain the wave radiation stresses with the effects of the wave irregularity and breaking. The breaking-wave-induced near-shore currents were numerically simulated to further validate the numerical model. The numerical results show that the model can be applied to study the breaking-wave-induced currents.

关 键 词：不规则波 JONSWAP波浪谱 抛物型缓坡方程 波浪破碎 波浪辐射应力 近岸流 

分 类 号：TV139.2[水利工程—水力学及河流动力学] O353.2[理学—流体力学]