Three-Dimensional Structure of Boundary Layers in Transition to Turbulence

Abstract

A spectral code for linear stability analysis has been developed that allows easy adaptation to a large variety of basic flows and stability equations. This code is the basis for extensions to analyze secondary and nonlinear stability in parallel and nonparallel flows. Improved numerical techniques have been developed to reduce the computational demand of secondary instability studies. A new approach to convective instability analysis in nonparallel flows on the basis of parabolized stability equations has been developed for incompressible and compressible flows. Encouraging results have been obtained in the areas of linear, nonlinear, and secondary instability. The code appears as a viable alternative to DNS codes that allows transition simulations at a small fraction of the computational cost. (jhd)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1989
Accession Number
ADA223242

Entities

People

  • Thorwald Herbert

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Boundary Layer Flow
  • Compressible Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Computer Programs
  • Differential Equations
  • Energy Transfer
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Partial Differential Equations
  • Stratified Fluids
  • Turbulent Flow
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Fluid Mechanics and Fluid Dynamics.