An Experimental Study of the Effect of Vibrations on Supercritical Fluid Transfer Processes under Microgravity Conditions |
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Authors: | V I Polezhaev V M Emelianov A I Ivanov A V Kalmykov D Beysens Y Garrabos |
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Institution: | (1) Institute for Problems in Mechanics, Russian Academy of Sciences, pr. Vernadskogo 101, Moscow, 117526, Russia;(2) Korolev Rocket-Space Corporation Energia, , ul. Lenina 4a, Korolev, Moscow oblast, 141070, Russia;(3) ESEME, Institut de Chimie de la Matiére Condensée de Bordeaux, Centre National de Recherche Scientifique, Université Bordeaux, av. du Dr. Schweitzer, F-33608 Pessac Cedex, France |
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Abstract: | On the basis of the data obtained in experiments onboard the Mirorbital complex (OC) in March and April 1999 with the ALICE-2 instrument, the influence of vibrations on heat propagation from a point-like source in the hexafluoride sulfur (SF6) under supercritical parameters is analyzed. The appearance of two different heat propagation regimes is found: along and across the direction of vibrations. Upon the occurrence of the second-type regime, the heating region first stretches in the direction perpendicular to the direction of vibrations and then propagates at a rate typical for the undisturbed case. The temperature relaxation process is analyzed, which takes place near the heater after its turn-off. The relaxation rate grows as the intensity of vibrations increases and the initial temperature tends to the critical one. The determining dimensionless parameters of the problem are suggested. |
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