Parametrizing the Energy Dissipation Rate in Stably Stratified Flows
Sukanta Basu (TU Delft - Civil Engineering & Geosciences)
Ping He (University of Michigan)
Adam W. DeMarco (Munitions Directorate)
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Abstract
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.
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