Near Field Turbulent Wake Predictions

Abstract

Experimental measurements of the near-field turbulent wake of a model of a self-propelled body have shown several surprising features. Numerical models using the parabolic form of the Navier-Stokes equations have some limitation when used to model this data. Two different versions of the partially parabolic form of the equations available in the literature are examined and weaknesses for the problem of the wake of a self-propelled body are discussed. A variant is proposed which accounts for the complex initial pressure field which is integral to the down-stream prediction of these wakes. it also deals with the problems connected with using incomplete experimental data as initial conditions for this type of calculation. Comparisons are made with experimental measurements of the self-propelled model with a simulated free surface. These comparisons illustrate the features of this model.

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Document Details

Document Type
Technical Report
Publication Date
Nov 08, 1988
Accession Number
ADA200467

Entities

People

  • M. B. Stewart

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Computational Science
  • Equations
  • Experimental Data
  • Flow Fields
  • Kinetic Energy
  • Measurement
  • Military Research
  • Momentum
  • Navier Stokes Equations
  • Near Field
  • Physics
  • Pressure Distribution
  • Pressure Gradients
  • Self Propelled
  • Stratified Fluids
  • Three Dimensional

Readers

  • Calculus or Mathematical Analysis
  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.