Microgravity Science and Technology

, Volume 21, Issue 1–2, pp 41–46 | Cite as

Iron Burning in Pressurised Oxygen Under Microgravity Conditions

Original Article

Abstract

An investigation of cylindrical iron rods burning in pressurised oxygen under microgravity conditions is presented. It has been shown that, under similar experimental conditions, the melting rate of a burning, cylindrical iron rod is higher in microgravity than in normal gravity by a factor of 1.8 ± 0.3. This paper presents microanalysis of quenched samples obtained in a microgravity environment in a 2.0 s duration drop tower facility in Brisbane, Australia. These images indicate that the solid/liquid interface is highly convex in reduced gravity, compared to the planar geometry typically observed in normal gravity, which increases the contact area between liquid and solid phases by a factor of 1.7 ± 0.1. Thus, there is good agreement between the proportional increase in solid/liquid interface surface area and melting rate in microgravity. This indicates that the cause of the increased melting rates for cylindrical iron rods burning in microgravity is altered interfacial geometry at the solid/liquid interface.

Keywords

Pressurised oxygen Microgravity Cylindrical iron rods Solid/liquid interface 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Phenomena in Microgravity Laboratory, Faculty of Built Environment and EngineeringQueensland University of TechnologyBrisbaneAustralia

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