Nucleation experiments in a microgravity environment

Nuth, Joseph A., Allen Jr, J.E., Lilleleht, L.U., Mackinnon, Ian D.R., Rietmeijer, Frans J.M., & Stephens, J.R. (1986) Nucleation experiments in a microgravity environment. In Lyndon B. Johnson Space Center Space Station Planetology Experiments (SSPEX), NASA, Johnson Space Centre, Houston TX, pp. 39-40.

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Abstract

A simple experimental apparatus is described in which a wide variety of vapor phase nucleation studies of refractory materials could be performed aboard NASA's KC-135 Research Aircraft. The chief advantage of a microgravity environment for these studies is the expected absence of thermally driven convective motions in the gas. The absence of convection leads to much more accurate knowledge of both the temperature distribution in the system and the time evolution of the refractory vapor concentration as a function of distance from the crucible.The evolution of the apparatus will be described as more experience is gained with the microgravity environment. Such experiments will be used to prepare for similar ones carried out aboard either the shuttle or Space Station where considerably longer duration experiments are possible.

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ID Code: 57744
Item Type: Conference Paper
Refereed: Yes
Additional Information: Document ID:19860017686
Accession Number: 86N27158
NTRS Ref: SEE N86-27136 17-88
Keywords: C-135 AIRCRAFT, MICROGRAVITY, EXPERIMENT DESIGN, SPACE SHUTTLE PAYLOADS, SPACEBORNE EXPERIMENTS, PARTICLE SIZE DISTRIBUTION, SPACEBORNE EXPERIMENTS
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Extraterrestrial Geology (040302)
Divisions: Current > Institutes > Institute for Future Environments
Copyright Owner: Copyright 1986 NASA
Deposited On: 11 Mar 2013 01:38
Last Modified: 14 Jul 2013 22:55

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