Numerical Investigation of Boundary Layer Transition Over Flat-Plate

Abstract

This paper presents two numerical cases of disturbed Navier-Stokes equations. In case 1, four order accuracy finite difference is used to investigate the evolution of negative frequency disturbance in Blasius boundary layer, results show us that negative frequency can reduce the streamwise wavelength of T-S wave, and accelerate the transition process. The effect of negative frequency lets to the breakdown of fluid structure becomes more significant. And, in the case two, two order accuracy finite volume method is used, Reynolds number is 900, and dimensionless frequency F is 86 in this case. Results present that the evolution process is more gradual in the positive frequency compare with the negative frequency in case 1. And the pressure contours clearly present a nonlinear interaction and break down process of two lambda vortexes.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013686

Entities

People

  • Chang Shu
  • Khoon Seng Yeo
  • Kunlun Liu
  • Zhengyi Wang

Organizations

  • National University of Singapore

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplitude
  • Boundaries
  • Boundary Layer
  • Boundary Layer Transition
  • Channel Flow
  • Computational Fluid Dynamics
  • Equations
  • Flow
  • Fluid Dynamics
  • Frequency
  • Instability
  • Laminar Boundary Layer
  • Layers
  • Mechanical Engineering
  • Navier Stokes Equations
  • Reynolds Number
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.