A flow source for the study of quantum turbulence in superfluid 4He

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F12%3A00399266" target="_blank" >RIV/68378271:_____/12:00399266 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/epjconf/20122502001" target="_blank" >http://dx.doi.org/10.1051/epjconf/20122502001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/20122502001" target="_blank" >10.1051/epjconf/20122502001</a>

Result language
angličtina
Original language name
A flow source for the study of quantum turbulence in superfluid 4He
Original language description
A flow source has been developed to generate turbulent superfluid flows in channels equipped for detection of quantised vortices. The source consists of a motor driven low temperature compressible volume capable of pushing or sucking superfluid He-4 intoa flow channel. Detection is based on the attenuation of second sound caused by the presence of quantised vortex lines in the turbulent flow. In this paper we present the technical details of the apparatus, along with some raw data obtained during the first successful low temperature test. The test has been performed using the source to generate a flow into a channel whose ends have been blocked by superleaks to allow for the inflow and outflow of the superfluid component of helium only. This techniqueenables to determine the a real density of quantised vortex lines in the temperature range 1.3 to 2.1 K, with well controlled flow velocities between 0.01 and 30 cm/s.
Czech name
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Czech description
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Project
<a href="/en/project/GA202%2F08%2F0276" target="_blank" >GA202/08/0276: Selected problems of cryogenic fluid dynamics</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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