The critical velocity of transition to turbulence in 3He-4He liquid solutions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00543584" target="_blank" >RIV/68378271:_____/20:00543584 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/10.0001906" target="_blank" >https://doi.org/10.1063/10.0001906</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/10.0001906" target="_blank" >10.1063/10.0001906</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The critical velocity of transition to turbulence in 3He-4He liquid solutions

Popis výsledku v původním jazyce

The transition between laminar and turbulent flows around a quartz tuning fork vibrating with frequency omega in superfluid He-4 and concentrated solutions (5 and 15% He-3 in He-4) in the temperature range 0.3-2.3 K has been studied. The temperature dependences of the amplitude of the critical transition velocity v(cr) are obtained. The relationship v(cr) similar to root(eta omega/rho) is shown to be applicable for the description of these dependences in concentrated solutions of He-3 in He-4 with density rho and viscosity eta, but this formula does not hold for the temperature dependence of v(cr) in pure He-4 over the entire temperature range explored. It is also shown that in contrast to pure He-4 temperature has virtually no effect in concentrated He-3-He-4 solutions on the drag coefficient in both laminar and turbulent regimes.n

Název v anglickém jazyce

The critical velocity of transition to turbulence in 3He-4He liquid solutions

Popis výsledku anglicky

The transition between laminar and turbulent flows around a quartz tuning fork vibrating with frequency omega in superfluid He-4 and concentrated solutions (5 and 15% He-3 in He-4) in the temperature range 0.3-2.3 K has been studied. The temperature dependences of the amplitude of the critical transition velocity v(cr) are obtained. The relationship v(cr) similar to root(eta omega/rho) is shown to be applicable for the description of these dependences in concentrated solutions of He-3 in He-4 with density rho and viscosity eta, but this formula does not hold for the temperature dependence of v(cr) in pure He-4 over the entire temperature range explored. It is also shown that in contrast to pure He-4 temperature has virtually no effect in concentrated He-3-He-4 solutions on the drag coefficient in both laminar and turbulent regimes.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Low Temperature Physics

ISSN

1063-777X

e-ISSN

1090-6517

Svazek periodika

46

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

971-976

Kód UT WoS článku

000583764100001

EID výsledku v databázi Scopus

2-s2.0-85094650060