2 September 2008 Molecular-transport modeling using direct simulation Monte Carlo methods for use in analyzing spacecraft and spacecraft instruments
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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.
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Bruce Matheson, Bruce Matheson, Joseph Hueser, Joseph Hueser, } "Molecular-transport modeling using direct simulation Monte Carlo methods for use in analyzing spacecraft and spacecraft instruments", Proc. SPIE 7069, Optical System Contamination: Effects, Measurements, and Control 2008, 70690F (2 September 2008); doi: 10.1117/12.795604; https://doi.org/10.1117/12.795604
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