近岸沿岸流及污染物运动的数值模拟  

Numerical simulation of longshore currents and pollutant movement in waves and currents in coastal zone

作　　者：唐军[1] 沈永明[1] 邱大洪[1] 

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,辽宁大连116023

出　　处：《海洋学报》2008年第1期147-155,共9页

基　　金："973"国家重点基础研究发展计划资助项目(2005CB724202);国家自然科学基金资助项目(50709004;50779006);海洋工程国家重点实验室研究基金资助课题

摘　　要：基于双曲型缓坡方程和近岸浅水方程对近岸波浪斜向入射破碎所生成的沿岸流及污染物在沿岸波流作用下的运动进行了数值模拟,并对数值模拟结果进行了验证分析。数值模拟结果表明,在相近工况参数下,随着入射波高的增大,沿岸流流速和平均水面升高值均明显增大;随着岸坡坡度的增加,沿岸流流速和平均水面升高值明显增大;随着入射波浪周期的增大,平均水面升高值明显增大。在沿岸缓坡区域,由斜向入射波浪破碎所产生的沿岸流对污染物的运动起着不可忽略的影响。Waves, breaking-wave-induced longshore currents and pollutant movement in waves and currents have been numerically simulated based on the hyperbolic mild-slope equation, the shallow water equation and the pollutant movement equation, and the comparison between the numerical and experimental results have also been made. The numerical results show that the longshore current velocity and wave set-up increase with the increase of the incident wave amplitude and offshore slope gradient; the wave set-up increases with the increase of the incident wave period. In a mild-slope coastal zone, the longshore currents induced by the inclined incident waves have important influence on longshore pollutant movement.

关 键 词：双曲型缓坡方程 破碎波 沿岸流 污染物 

分 类 号：TV139.2[水利工程—水力学及河流动力学] X143[环境科学与工程—环境科学]