Numerical Simulation of Particle-Wave Interaction on Boundary Layers

Abstract

This research program involves a computational study of the effects of disturbances generated from a moving particle on boundary layer transition. The practical importance of this problem stems from the fact that as an underwater vehicle moves through a particulate environment, particles enter the boundary layer and produce local disturbances. These disturbances may act as a bypass mechanism to transition and turbulence by interacting with boundary layer instabilities. The objective of this research is to study the basic mechanisms of the particle interaction and its effect on transition in the boundary layer. For this purpose, a direct numerical simulation is undertaken and the spherical particle is represented by a forcing function in the Navier Stokes equations. Results reveal good agreement with experimental studies. The report is presented in two parts. The first part concerns a general overview of the work accomplished and the second part summarizes our recent efforts on the modeling of steady/unsteady flow over a cylinder.

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Document Details

Document Type
Technical Report
Publication Date
Jul 19, 1994
Accession Number
ADA282184

Entities

People

  • E. M. Saiki
  • Sedat Biringen

Organizations

  • University of Colorado Boulder

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Boundary Layer Transition
  • Computational Fluid Dynamics
  • Computational Science
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Flow
  • Hydrodynamics
  • Laminar Boundary Layer
  • Navier Stokes Equations
  • Reynolds Number
  • Strouhal Number
  • Turbulent Flow
  • Unsteady Flow
  • Vortex Shedding

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.