Parametrizing the Energy Dissipation Rate in Stably Stratified Flows
Sukanta Basu, Ping He, Adam W. DeMarco
Abstract
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.
Topics & Concepts
DissipationTurbulenceMechanicsPhysicsEnergy (signal processing)Boundary (topology)Stratified flowStatistical physicsTurbulence kinetic energyBoundary value problemKinetic energyStratified flowsMathematicsClassical mechanicsDirect numerical simulationEnergy cascadeScale (ratio)Boundary layerComputer simulationField (mathematics)K-omega turbulence modelNumerical modelsComputational fluid dynamicsMixing (physics)Oceanographic and Atmospheric ProcessesFluid Dynamics and Turbulent FlowsMeteorological Phenomena and Simulations