Critical dynamics in microgravity

Autor: Robert Duncan, S. T. P. Boyd, S. Gianoulakis, W.A. Moeur, R. Akau, S. Robinson
Rok vydání: 1996
Předmět:
Zdroj: International Journal of Thermophysics. 17:631-639
ISSN: 1572-9567
0195-928X
DOI: 10.1007/bf01441509
Popis: Although many well-controlled experiments have been conducted to measure the static properties of systems near criticality, few experiments have explored the transport properties in systems driven very far away from equilibrium as the transition occurs, Here we propose to measure the thermal gradient across the supertluid (HeII)—normal fluid (HeI interface in microgravity conditions as a function of the heat flux Q used to make the measurements, Microgravity conditions are required (1) to avoid the hydrostatic pressure variation along the height of the helium column t a concern forQ 3 µW cm−2 in our apparatus, and (3) to increase theQ=0 interfacial width from its value of a few tens of microns on Earth to about a millimeter in orbit. New technologies described in this paper are under development for this experiment, which is in definition for Space Shuttle flight.
Databáze: OpenAIRE
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