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Wave-resolving simulations of viscous wave attenuation effects on Langmuir circulation
Ocean Modelling ( IF 3.2 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.ocemod.2020.101679
Yasushi Fujiwara , Yutaka Yoshikawa , Yoshimasa Matsumura

Abstract Interaction processes of attenuating surface waves and underlying currents are explicitly simulated with a nonhydrostatic free surface numerical model. The model, designed with special attention to the numerical conservation properties of energy and momentum, is capable of accurately capturing the effect of the virtual wave stress, a viscous momentum transfer from waves to current. Simple experiments with the present model show that the Langmuir circulations in the wave-resolving simulations tend to be stronger than the ones in the Craik–Leibovich equation with corresponding Stokes drift profiles. The underestimation in the Craik–Leibovich equation can be corrected by addressing momentum transfer from attenuating waves to currents as the virtual wave stress at the surface.

中文翻译:

粘性波衰减对朗缪尔环流影响的波分辨模拟

摘要 用非静水自由表面数值模型明确模拟了衰减表面波和下伏电流的相互作用过程。该模型特别关注能量和动量的数值守恒性质,能够准确捕捉虚拟波浪应力的影响,即从波浪到电流的粘性动量转移。本模型的简单实验表明,波浪解析模拟中的朗缪尔环流往往比具有相应斯托克斯漂移剖面的 Craik-Leibovich 方程中的环强。Craik-Leibovich 方程中的低估可以通过解决从衰减波到电流的动量转移作为表面的虚拟波应力来纠正。
更新日期:2020-10-01
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