Vorticity enhancement in thermal counterflow of superfluid helium
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10378133" target="_blank" >RIV/00216208:11320/18:10378133 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.97.064512" target="_blank" >https://doi.org/10.1103/PhysRevB.97.064512</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.97.064512" target="_blank" >10.1103/PhysRevB.97.064512</a>
Alternative languages
Result language
angličtina
Original language name
Vorticity enhancement in thermal counterflow of superfluid helium
Original language description
The dynamics of relatively small particles in steady-state thermal counterflow of superfluid He-4 (He II) is experimentally investigated by using the particle tracking velocimetry technique. We find that, close to the heat source, the mean distance between quantized vortices, representing the quantum length scale of the flow, is apparently about one order of magnitude smaller than that expected in the bulk, at the same temperature and heat flux. Possible physical mechanisms leading to this significant vorticity enhancement in the heater proximity are discussed and strongly support the view that the geometry of the channel where thermal counterflow occurs has a relevant influence on the observed flow features. Boundary and entrance effects, which have received little attention to date, should therefore be included in a comprehensive description of He II turbulent flows.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/GA16-00580S" target="_blank" >GA16-00580S: Quantum turbulence boundaries</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
—
Volume of the periodical
97
Issue of the periodical within the volume
6
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
—
UT code for WoS article
000425090500003
EID of the result in the Scopus database
2-s2.0-85042143542