Multiple critical velocities in oscillatory flow of superfluid He-4 due to quartz tuning forks

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10335722" target="_blank" >RIV/00216208:11320/16:10335722 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.94.214503" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.94.214503</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.94.214503" target="_blank" >10.1103/PhysRevB.94.214503</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Multiple critical velocities in oscillatory flow of superfluid He-4 due to quartz tuning forks

Popis výsledku v původním jazyce

We report recent investigations into the transition to turbulence in superfluid He-4, realized experimentally by measuring the drag forces acting on two custom-made quartz tuning forks with fundamental resonances at 6.5 kHz and 55.5 kHz, in the temperature range 10 mK to 2.17 K. In pure superfluid in the zero temperature limit, three distinct critical velocities were observed with both tuning forks. We discuss the significance of all critical velocities and associate the third critical velocity reported here with the development of large vortical structures in the flow, which thus starts to mimic turbulence in classical fluids. The interpretation of our results is directly linked to previous experimental work with oscillators such as tuning forks, grids, and vibrating wires, focusing on the behavior of purely superfluid He-4 at very low temperatures.

Název v anglickém jazyce

Multiple critical velocities in oscillatory flow of superfluid He-4 due to quartz tuning forks

Popis výsledku anglicky

We report recent investigations into the transition to turbulence in superfluid He-4, realized experimentally by measuring the drag forces acting on two custom-made quartz tuning forks with fundamental resonances at 6.5 kHz and 55.5 kHz, in the temperature range 10 mK to 2.17 K. In pure superfluid in the zero temperature limit, three distinct critical velocities were observed with both tuning forks. We discuss the significance of all critical velocities and associate the third critical velocity reported here with the development of large vortical structures in the flow, which thus starts to mimic turbulence in classical fluids. The interpretation of our results is directly linked to previous experimental work with oscillators such as tuning forks, grids, and vibrating wires, focusing on the behavior of purely superfluid He-4 at very low temperatures.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

—

Projekt

<a href="/cs/project/GA14-02005S" target="_blank" >GA14-02005S: Kryogenní helium jako pracovní látka pro studium klasické a kvantové turbulence</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

PHYSICAL REVIEW B

ISSN

2469-9950

e-ISSN

—

Svazek periodika

94

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

000389500900004

EID výsledku v databázi Scopus

2-s2.0-85001930587