High Reynolds Number Stratified Turbulent Wakes: Internal Wave Energetics, Self-Similarity and Subgrid-Scale Modeling

Abstract

The work funded by this grant is founded on unique stratified turbulent sphere wake database generated by massively parallel Large Eddy Simulations spanning a range of values of body-based Reynolds, Re, and Froude, Fr, numbers. The flow phenomenology observed with increasing Re indicates that a novel form of persistent, highly-layered, and space-filling turbulence emerges in the late-wake core. In addition to quantifying and parameterizing the characteristics of this layered turbulence, the energetic content, directional preference and along-wake-periphery of wake-radiate internal waves has been systematically studied. Internal waves become a dominant contributor to the wake energy budget, particularly at high Re.

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Document Details

Document Type
Technical Report
Publication Date
Dec 19, 2019
Accession Number
AD1088868

Entities

People

  • Peter J Diamessis

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Databases
  • Directional
  • Fluid Dynamics
  • Fluid Mechanics
  • Internal Waves
  • Large Eddy Simulation
  • Mechanics
  • Physics
  • Reynolds Number
  • Turbulence
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Mechanics and Fluid Dynamics.
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers

Technology Areas

  • Space