Second-sound studies of coflow and counterflow of superfluid 4He in channels
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00455207" target="_blank" >RIV/68378271:_____/15:00455207 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1063/1.4921816" target="_blank" >http://dx.doi.org/10.1063/1.4921816</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.4921816" target="_blank" >10.1063/1.4921816</a>
Alternative languages
Result language
angličtina
Original language name
Second-sound studies of coflow and counterflow of superfluid 4He in channels
Original language description
We report a comprehensive study of turbulent superfluid 4He flow through a channel of square cross section. We study for the first time two distinct flow configurations with the same apparatus: coflow (normal and superfluid components move in the same direction), and counterflow (normal and superfluid components move in opposite directions). We realise also a variation of counterflow with the same relative velocity, but where the superfluid component moves while there is no net flow of the normal component through the channel, i.e., pure superflow . We use the second-sound attenuation technique to measure the density of quantised vortex lines in the temperature range 1.2 K T T? 2.18 K and for flow velocities from about 1 mm/s up to almost 1 m/s in fully developed turbulence. We find that both the steady-state and temporal decay of the turbulence significantly differ in the three flow configurations, yielding an interesting insight into two-fluid hydrodynamics.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics of Fluids
ISSN
1070-6631
e-ISSN
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Volume of the periodical
27
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
22
Pages from-to
"065101-1"-"065101-22"
UT code for WoS article
000357688800038
EID of the result in the Scopus database
2-s2.0-84930960256