A Semi-Empirical Equation for the Viscosity of Air.

Abstract

Sutherland's theoretical expression for the absolute or dynamic viscosity of a gas has been modified to represent experimental viscosity data for air. The resulting semi-empirical equation accurately describes measured viscosities of air for temperatures ranging from the boiling point at 78 K to molecular dissociating conditions at 2500 K. Discrepancies between measured values and semi-empirical results rarely exceed 2%. Other more limited expressions for the viscosity of air are also compared to measured viscosity data and discussed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1979
Accession Number
ADA072053

Entities

People

  • David Ritzel
  • James J. Gottlieb

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Blast Waves
  • Boiling Point
  • Chemistry
  • Climate Change
  • Dynamic Pressure
  • Equations
  • Experimental Data
  • Flow
  • Fluid Flow
  • Handbooks
  • Laminar Flow
  • Mechanics
  • Physics
  • Relative Motion
  • Reynolds Number
  • Shear Stresses
  • Shock Waves

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.