CELERITIES OF TEMPERATURE AND VELOCITY TURBULENT FLUCTUATIONS IN A BOUNDARY LAYER (1). NEW ADVANCES IN FACILITIES AND METHODS OF MEASUREMENTS (2).

Abstract

The space-time correlations of velocity and temperature fluctuations lead to definitions of celerities and the corresponding equations with and without frequency filtering have been written. These equations show that the celerities differ in general from mean velocity of the fluid mainly due to the effect of triple space-time correlations. Measurements have been made in a turbulent boundary layer on a heated plate. The results concerning celerities and correlations for temperature show a partial analogy between temperature and velocity pattern, but the effects are stronger for the temperature pattern. New apparatus and methods for measurement of space-time correlations for temperature and velocity fluctuations are described, using a correlation computer and linearized constant-temperature anemometer. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1969
Accession Number
AD0684739

Entities

People

  • Alexandre Favre
  • Edmond Verollet
  • Regis Dumas

Tags

DTIC Thesaurus Topics

  • Anemometers
  • Applied Mechanics
  • Boundaries
  • Boundary Layer
  • Computers
  • Congress
  • Equations
  • Filtration
  • Fluid Mechanics
  • Frequency
  • Layers
  • Measurement
  • Mechanics
  • Motion
  • Physical Properties
  • Turbulent Boundary Layer

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Dynamics.
  • International Relations and European Studies

Technology Areas

  • Space
  • Space - Hall-Effect Thruster