VISUALIZATION OF THE STARTING VORTEX SHED BY A CYLINDER ACCELERATING IN SUPERFLUID HELIUM-4: PRELIMINARY RESULTS
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10483837" target="_blank" >RIV/00216208:11320/24:10483837 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.14311/TPFM.2024.003" target="_blank" >https://doi.org/10.14311/TPFM.2024.003</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.14311/TPFM.2024.003" target="_blank" >10.14311/TPFM.2024.003</a>
Alternative languages
Result language
angličtina
Original language name
VISUALIZATION OF THE STARTING VORTEX SHED BY A CYLINDER ACCELERATING IN SUPERFLUID HELIUM-4: PRELIMINARY RESULTS
Original language description
A cylinder of elliptical cross-section is accelerated from rest in superfluid helium-4, a unique cryogenic liquid, characterized by very small values of kinematic viscosity. The starting vortex generated by the cylinder is visualized using the particle tracking velocimetry technique, at different values of fluid temperature and cylinder acceleration. The vortex trajectory and strength are estimated from the particles' positions and velocities, in view of comparing the behaviour of the shed vortices in various experimental conditions. We specifically find that the vortex trajectory does not appear to depend appreciably on the fluid temperature and cylinder acceleration magnitude, while the latter seems to influence significantly the vortex strength. Overall, the preliminary results presented here show that further studies are required to assess in a quantitative way similarities and differences with analogous flows of Newtonian fluids.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/LL2326" target="_blank" >LL2326: How is flying possible in a superfluid? Probing lift generation in liquid helium-4 to identify its Newtonian features</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
TOPICAL PROBLEMS OF FLUID MECHANICS 2024
ISBN
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ISSN
2336-5781
e-ISSN
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Number of pages
8
Pages from-to
15-22
Publisher name
ACAD SCI CZECH REPUBLIC, INST THERMOMECHANICS
Place of publication
PRAGUE 8
Event location
Prague
Event date
Feb 21, 2024
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001242655400003