Subgrid Scale Modeling For LES Simulation of Flow in a Turbulent Bottom Boundary Layer

Abstract

The long-term goal of this work is to develop an accurate and efficient LES (large-eddy simulation) model of turbulent flows in oceanic boundary layers. The major objectives to be achieved are: (1) Acquire better understanding of specific properties of oceanic boundary layers, particular attention being paid to statistics of small-scale coherent structures and their adequate representation by subgridscale (SGS) models. (2) Implement the Smagorinsky and dynamic SGS models and validate them for oceanic boundary layers through comparison with direct numerical simulations (DNS) and autonomous underwater vehicle (AUV) field data. (3) Develop and test a SGS model capable of accurate parameterization of the effects of small-scale coherent structures. The work involves theoretical analysis, numerical computations, and comparison with field measurements. The primary research tools are three-dimensional DNS and LES models, which allow simulation of turbulent layers in shallow water.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2000
Accession Number
ADA609804

Entities

People

  • Donald Slinn
  • Manhar R. Dhanak
  • Oleg Zikanov

Organizations

  • Florida Atlantic University

Tags

Communities of Interest

  • Air Platforms
  • Autonomy
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Convection
  • Flow
  • Fluid Flow
  • High Resolution
  • Layers
  • Shallow Water
  • Simulations
  • Stratified Fluids
  • Temperature Gradients
  • Three Dimensional
  • Turbulent Flow
  • Two Dimensional
  • Water

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Ocean-Atmosphere Mesoscale Modeling, Data Assimilation, and Flux Boundary Layers