Accession Number:

ADA568175

Title:

Direct Simulation Monte Carlo for Atmospheric Entry. 2. Code Development and Application Results

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 second article of two parts, several different implementations of the DSMC technique in various, widely used codes are described. Validation of the DSMC technique for hypersonic flows using data measured in the laboratory is discussed. A review is then provided of the application of the DSMC technique to atmospheric entry flows. Illustrations of DSMC analyses are provided for slender and blunt body vehicles for entry into Earth, followed by examples of DSMC modeling of planetary entry flows.

Subject Categories:

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

Distribution Statement:

APPROVED FOR PUBLIC RELEASE