Features of inviscid fluid microjets outflow into vacuum
Yaskin A. S. 1, Zarvin A. E. 1, Kalyada V. V. 1, Dubrovin K. A. 1,2
1Novosibirsk State University, Novosibirsk, Russia
2Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Email: yas@nsu.ru, zarvin@phys.nsu.ru, daf2@mail.ru, k.dubrovin1@g.nsu.ru

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The paper presents experimental results on ethanol microjets outflow from a capillary (vertical flow by gravity) and from a hole in the wall (horizontal flow). The long-term liquid microjet flowing into vacuum has been shown to be highly unstable with sudden changes in direction, structure and observable density and essentially differing from well-studied modes of outflow into the atmosphere as well as from the modes of short-term outflow into vacuum. The main specific features of the flows and conditions giving rise to instabilities are described. Possible explanation of the reasons for microjet destruction is given. Keywords: liquid microjet, barocapillary instability of flows, modeling of vacuum conditions, ethanol.
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