we need alternatives for heat transfer. How about flowing granular materials?
FLUID DYNAMICS
Uncool heat pipes in microgravity
1. Brent Grocholski<http://www.sciencemag.org/search?author1=Brent+Grocholski&sortspec=date&submit=Submit>
Heat pipes are efficient heat transfer systems commonly used to cool things such as microprocessors. Heat pipes have a hot end that evaporates liquid, which flows as vapor to a cold end that condenses it. The liquid then normally returns to the hot end through capillary action, completing a circuit with a net cooling effect, although the hot end commonly dries out, lowering the performance of the device—at least on Earth. Kundan et al.investigated how heat pipes work in the microgravity of the International Space Station. Surprisingly, on the station, the hot end quickly floods, because of changes in surface tension caused by the lower gravity. This observation suggests that heat pipes will have different performance limitations in space.
Phys. Rev. Lett. 10.1103/PhysRevLett.114.146105 (2015).
Feed: Science: Current Issue
Posted on: Friday, 22 May 2015 10:00 AM
Author: Brent Grocholski
Subject: [Editors' Choice] Uncool heat pipes in microgravity
Author: Brent Grocholski
View article...<http://www.sciencemag.org/content/348/6237/877.5.full?rss=1>
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