We use a database of direct numerical simulations to evaluate parametrizations for energy dissipation rate in stably stratified flows. We show that shear-based formulations are more appropriate for stable boundary layers than commonly used buoyancy-based formulations. As part of the derivations, we explore several length scales of turbulence and investigate their dependence on local stability.

中文翻译：

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稳定分层流中的能量耗散率参数化

我们使用直接数值模拟数据库来评估稳定分层流中能量耗散率的参数化。我们表明，基于剪切的公式比常用的基于浮力的公式更适合稳定边界层。作为推导的一部分，我们探索了湍流的几个长度尺度，并研究了它们对局部稳定性的依赖。