ABSTRACT In the present investigation, the evolution of stratified turbulence submitted to a non-vertical shear is studied using second-order models. Different cases of turbulent flows are considered. Firstly, the case of a purely horizontal shear is considered (). In the second case, we study a purely vertical shear . Finally, we studied an inclined shear corresponding to . For various inclinations, angle θ, the evolution of the turbulence is investigated for a fixed Richardson number at 0.2 related to low stratification. However, we study the influence of shear inclination angle θ on the evolution of turbulence via the coupling between second-order models (SSG-SL, SSG-CL, and SSG-LRR). A good agreement between predictions of second-order models and those of Direct Numerical Simulation of Jacobitz is detected for the principal component of anisotropy .

中文翻译：

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非垂直剪切对分层湍流的影响使用二阶模型之间的耦合

摘要 在本研究中，使用二阶模型研究了受非垂直剪切作用的分层湍流的演变。考虑了湍流的不同情况。首先，考虑纯水平剪切的情况（）。在第二种情况下，我们研究纯垂直剪切。最后，我们研究了对应于 的倾斜剪切。对于各种倾斜角 θ，研究了与低分层相关的固定理查森数为 0.2 的湍流演变。然而，我们通过二阶模型（SSG-SL、SSG-CL 和 SSG-LRR）之间的耦合研究了剪切倾角 θ 对湍流演变的影响。