Damping in Rarefield Nonsteady Flows (AASERT FY93).

Abstract

When a fluid flow is composed of several gas species having different molecular weights and molecular composition, such as air, in particular at high temperature, various nonequilibrium effects lead to well-known changes in the flow structure over that for a simple gas. These are frequently termed relaxation effects when associated with nonequilibrium of the vibrational modes of a polyatomic molecule, chemical composition of a dissociating molecule, or degree of ionization of an ion. Relaxation effects also arise owing to a difference in the molecular weights of two species making up a flow, which introduces a time lag in the transfer of translational energy between the two.

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Document Details

Document Type
Technical Report
Publication Date
Dec 20, 1996
Accession Number
ADA322731

Entities

People

  • Donald Baganoff
  • Sarah Whitleck

Organizations

  • Stanford University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemical Composition
  • Equations
  • Experimental Data
  • Flow
  • Fluid Flow
  • High Temperature
  • Mach Number
  • Materials Science
  • Molecular Weight
  • Molecules
  • Monte Carlo Method
  • Polyatomic Molecules
  • Relaxation Time
  • Simulations
  • Steady State
  • Transport Properties
  • Unsteady Flow

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Fluid Mechanics and Fluid Dynamics.
  • Molecular Photonics/Laser Physics