DNS of Boundary Layer Transition Induced by a Coherent Perturbation

Abstract

Bypass transition of a boundary layer takes place at high main stream turbulence levels. It is governed by the intrusion of non-linear disturbances into the viscous sublayer. In this paper a numerical study is presented in which a spatially developing laminar boundary layer is subdued to large scale (non- linear) disturbances. The (fully compressible) Navier-Stokes equations are solved using direct numerical simulation with a higher order finite difference method on a collocated grid. The results show that the initially smooth disturbance rapidly changes into an arrow-head structure with the characteristics of a turbulent spot.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2001
Accession Number
ADP013670

Entities

People

  • H. C. De Lange
  • R. Bastiaans

Organizations

  • Eindhoven University of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Boundary Layer Transition
  • Compressible Flow
  • Equations
  • Flow
  • Fluid Flow
  • Free Stream
  • Heat Transfer
  • Intrusion
  • Laminar Boundary Layer
  • Layers
  • Parallel Computing
  • Parallel Processing
  • Simulations
  • Turbulence
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Linear Algebra