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中文核心期刊

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

  • 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.

     

    Abstract: Near-shore currents induced by the irregular water wavesand their breaking were numerically simulated based on the parabolic mildslope equation and near-shore current model. The unidirectional incidentirregular wave was first put into being discrete with the Jonswap wavespectrum and then simulated using the parabolic mild slope equation toobtain the wave radiation stresses with the effects of the wave irregularityand breaking. The breaking-wave-induced near-shore currents werenumerically simulated to further validate the numerical model. The numericalresults show that the model can be applied to study thebreaking-wave-induced currents.

     

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