大气和海洋科学快报（英文版）2021，Vol.14Issue(5)：30-36,7.
两方程湍流模型对内背风波数值模拟的影响
Effects of a two-equation turbulence model on the simulation of the internal lee waves
摘要
Abstract
In order to understand the wave-turbulence interaction under non-hydrostatic conditions to prepare future ad-vanced very-high-resolution ocean reanalysis data,an σ-coordinate ocean model—namely,the Marine Environ-ment Research and Forecasting(MERF)model—with an idealized supercritical slope topography is applied to conduct a series of high-resolution numerical experiments with and without the non-hydrostatic approximation.The popular Mellor-Yamada two-equation turbulence model(MY2.5)is enclosed in MERF to validate its effect on small-scale internal lee waves.Instantaneous results show that the internal lee-wave processes are relaxed through employment of the MY2.5 scheme,whether or not in the non-hydrostatic model.Time averaged results suggest the influences of the vertical mixing parameterization scheme on the numerical results are more dominant than the non-hydrostatic/hydrostatic selection for the large-scale dynamic process.Besides,diagnostic analyses of the energy budget show that the spread of internal lee waves at the slope is dramatically suppressed by the vertical turbulent mixing,indicating more tidal energy is able to be converted into the irreversible mixing when the two-equation turbulence model is employed.关键词
非静力/内波/湍流混合Key words
Non-hydrostatic/MERF/Internal wave/Turbulent mixing引用本文复制引用
Xuhui Hu,Xuefeng Zhang,Lei Lin,Lianxin Zhang,Shifan Wang..两方程湍流模型对内背风波数值模拟的影响[J].大气和海洋科学快报（英文版）,2021,14(5):30-36,7.基金项目
This study was supported by the National Key Research and Develop-ment Program of China[grant number 2016YFC1401800],the National Programme on Global Change and Air-Sea Interaction of China[grant number GASI-IPOVAI-04],and the National Natural Science Foundation of China[grant numbers 41876014 and 41606039]. （）
