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Simulations of Ground and Space-Based Oxygen Atom ExperimentsA low-earth orbit (LEO) materials erosion scenario and the ground-based experiment designed to simulate it are compared using the direct-simulation Monte Carlo (DSMC) method. The DSMC model provides a detailed description of the interactions between the hyperthermal gas flow and a normally oriented flat plate for each case. We find that while the general characteristics of the LEO exposure are represented in the ground-based experiment, multi-collision effects can potentially alter the impact energy and directionality of the impinging molecules in the ground-based experiment. Multi-collision phenomena also affect downstream flux measurements.
Document ID
20030061177
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Finchum, A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Cline, J. A.
(Spectral Sciences, Inc. Burlington, MA, United States)
Minton, T. K.
(Montana State Univ. Bozeman, MT, United States)
Braunstein, M.
(Spectral Sciences, Inc. Burlington, MA, United States)
Date Acquired
August 21, 2013
Publication Date
April 7, 2003
Subject Category
Structural Mechanics
Meeting Information
Meeting: 9th International Conference on Materials in a Space Environment
Country: Netherlands
Start Date: June 16, 2003
End Date: June 20, 2003
Funding Number(s)
CONTRACT_GRANT: NAS8-00201
Distribution Limits
Public
Copyright
Public Use Permitted.
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