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Thermal modeling of phase change solidification in thermal control devices including natural convection effectsNatural convection effects in phase change thermal control devices were studied. A mathematical model was developed to evaluate natural convection effects in a phase change test cell undergoing solidification. Although natural convection effects are minimized in flight spacecraft, all phase change devices are ground tested. The mathematical approach to the problem was to first develop a transient two-dimensional conduction heat transfer model for the solidification of a normal paraffin of finite geometry. Next, a transient two-dimensional model was developed for the solidification of the same paraffin by a combined conduction-natural-convection heat transfer model. Throughout the study, n-hexadecane (n-C16H34) was used as the phase-change material in both the theoretical and the experimental work. The models were based on the transient two-dimensional finite difference solutions of the energy, continuity, and momentum equations.
Document ID
19730004405
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Ukanwa, A. O. (Colorado School of Mines Golden, CO, United States)
Stermole, F. J. (Colorado School of Mines Golden, CO, United States)
Golden, J. O. (Colorado School of Mines Golden, CO, United States)
Date Acquired
September 2, 2013
Publication Date
January 26, 1972
Subject Category
Chemistry
Report/Patent Number
CSM-CPR-R372
ASR-2
NASA-CR-129910
Accession Number
73N13132
Funding Number(s)
CONTRACT_GRANT: NAS8-30511
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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