RELAXATION IN GAS-PARTICLE FLOW

Abstract

Flow of gas-particle mixtures may exhibit significant relaxation effects if the particle velocity and temperature cannot follow rapid changes in the flow conditions. These relaxation phenomena are first demonstrated in a discussion of viscous drag and heat transfer for a single particle which has no effect on the gas flow. If there are enough particles to make up a significant fraction of the mass of the mixture, the thermodynamic properties of the mixture may differ considerably from those of the gas alone, and a number of these properties are derived. Equations for one-dimensional flow of uniform mixtures are applied to shock waves, steady nozzle flows, and general nonsteady flows to illustrate the relaxation processes. For low and moderate particle concentration, the volume occupied by the particles can often be neglected. Since this assumption may not be adequate for high concentrations, some effects of a finite particle volume are also discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1968
Accession Number
AD0675500

Entities

People

  • George Rudinger

Organizations

  • Purdue University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Energy
  • Fluid Mechanics
  • Gas Flow
  • Heat Transfer
  • Heat Transfer Coefficients
  • Jet Propulsion
  • Mach Number
  • New York
  • Numerical Integration
  • Reynolds Number
  • Steady Flow
  • Thermal Conductivity
  • Thermodynamic Properties

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.
  • Plasma Physics.