The Effects of Unsteady Potential Flow on Heated Laminar Boundary Layers in Water: Flow Properties and Stability

Abstract

The effects of unsteadiness and the stability of boundary-layer flows as governed by the Orr-Sommerfeld equation are discussed. The condition required for validity of the quasisteady approximation of governing flow equations is that the ratio of diffusion time to flow time should be small. It is also shown that criteria for validity of the quasi- steady approximation of the Orr-Sommerfeld equation are based on modifications of this ratio, and are not nearly as stringent. Examples of heated wedge flows in water that are presented and discussed show the profound effect of even slowly varying unsteadiness on both laminar boundary-layer flow and its stability.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1977
Accession Number
ADA047711

Entities

People

  • J. Aroesty
  • L. S. Yao
  • W. Matyskiela
  • W. S. King

Organizations

  • RAND Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Counter IED
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Equations
  • Flow
  • Fluid Dynamics
  • Fluid Mechanics
  • Heat Transfer
  • Hydrodynamics
  • Laminar Boundary Layer
  • Layers
  • Mechanics
  • Potential Flow
  • Pressure Gradients
  • Reynolds Number

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.