High Altitude Flow and Radiation Analysis of Stardust Reentry

Iain D. Boyd, University of Michigan, Ann Arbor, MI
In this talk, we describe the application of the non-continuum direct simulation Monte Carlo (DSMC) method to Stardust flow analysis at altitudes of 81 and 71 km. Results from DSMC are compared with continuum CFD results. Important non-continuum effects are observed that affect convective heating to the vehicle. The DSMC and CFD flow field results are then used to analyze the radiation signatures and comparisons are made with data from the Echelle instrument. The comparisons point out several areas where further work is required in flow and radiation modeling. The DSMC technique is also used to analyze emissions observed in the Echelle spectra from metal impurities believed to originate in the white paint applied to the exterior of the Stardust capsule.