Accession Number:

ADA568174

Title:

Direct Simulation Monte Carlo for Atmospheric Entry. 1. Theoretical Basis and Physical Models

Descriptive Note:

Conference paper

Corporate Author:

MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING

Personal Author(s):

Report Date:

2009-09-01

Pagination or Media Count:

29.0

Abstract:

The direct simulation Monte Carlo method DSMC has evolved over 40 years into a powerful numerical technique for the computation of complex, nonequilibrium gas flows. In this context, nonequilibrium means that the velocity distribution function is not in an equilibrium form due to a low number of intermolecular collisions within a fluid element. In atmospheric entry, nonequilibrium conditions occur at high altitude and in regions of flow fields with small length scales. In this first article of two parts, the theoretical basis of the DSMC technique is discussed. In addition, the methods used in DSMC are described for simulation of high temperature, real gas effects and gas-surface interactions. The current status of the various models is reviewed and areas where further work is required are identified.

Subject Categories:

  • Statistics and Probability
  • Fluid Mechanics
  • Spacecraft Trajectories and Reentry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE