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Proceedings Paper

Molecular-transport modeling using direct simulation Monte Carlo methods for use in analyzing spacecraft and spacecraft instruments
Author(s): Bruce Matheson; Joseph Hueser D.D.S.
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Paper Abstract

The Direct Simulation Monte Carlo (DSMC) Analysis Code (DAC), as released by NASA, is a general purpose, gas dynamic, transport analysis suite of codes. These codes have been acquired by Ball Aerospace & Technologies Corp. (BATC) through a software usage agreement and have been modified to do a more detailed analysis of contaminant molecular transport of spacecraft and spacecraft instruments over mission lifetimes, typically 5 to 7 years. This transport model takes advantage of the proven algorithms within DAC to handle complex surface geometries and time-dependant gas dynamics. Additions to the code include diffusion of contaminants through solid surfaces, temperature and coverage-dependant adsorption/desorption for the contaminants being modeled, and input data for molecular diameters, molecular weights, and diffusion parameters for the common contaminants found in spacecraft materials and coatings.

Paper Details

Date Published: 2 September 2008
PDF: 17 pages
Proc. SPIE 7069, Optical System Contamination: Effects, Measurements, and Control 2008, 70690F (2 September 2008); doi: 10.1117/12.795604
Show Author Affiliations
Bruce Matheson, Ball Aerospace & Technologies Corp. (United States)
Joseph Hueser D.D.S., Aeroscience Consultants Corp. (United States)

Published in SPIE Proceedings Vol. 7069:
Optical System Contamination: Effects, Measurements, and Control 2008
Sharon A. Straka, Editor(s)

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