Quantum, or classical turbulence?

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10291315" target="_blank" >RIV/00216208:11320/14:10291315 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1209/0295-5075/105/46002" target="_blank" >http://dx.doi.org/10.1209/0295-5075/105/46002</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1209/0295-5075/105/46002" target="_blank" >10.1209/0295-5075/105/46002</a>

Result language
angličtina
Original language name
Quantum, or classical turbulence?
Original language description
Our experimental answer is that in thermal counterflow of superfluid He-4 both quantum and classical characteristics of turbulence can be detected simultaneously, depending on the length scale at which this quantum flow is probed. We study it at length scales l(exp) straddling two orders of magnitude across the average distance l between quantized vortices. The Lagrangian dynamics of solid deuterium particles of size d approximate to l/10 is investigated by using the particle tracking velocimetry technique. The normalized probability distribution of the particle velocity changes from the power-law shape typical of quantum turbulence, at scales l(exp) less than or similar to l, to the nearly Gaussian form typical of classical turbulent flows, at l(exp)greater than or similar to l.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BK - Liquid mechanics
OECD FORD branch
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Project
<a href="/en/project/GAP203%2F11%2F0442" target="_blank" >GAP203/11/0442: Visualization of liquid helium flows</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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