Convective heat transport in two-phase superfluid/ vapor He-4 system

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10389788" target="_blank" >RIV/00216208:11320/18:10389788 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/1.5055836" target="_blank" >https://doi.org/10.1063/1.5055836</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5055836" target="_blank" >10.1063/1.5055836</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Convective heat transport in two-phase superfluid/ vapor He-4 system

Popis výsledku v původním jazyce

We have recently shown that under certain cryogenic conditions heat can flow from a colder but constantly heated body to a hotter but constantly cooled body. Specifically, we have provided experimental evidence that heat flows through normal liquid and gaseous phases of 4He from the constantly heated, but cooler, bottom plate of a Rayleigh-Benard convection cell to its hotter, but constantly cooled, top plate. Here we report results of a modified experiment, where the bottom normal liquid helium layer is replaced by superfluid 4He, providing, together with a superfluid film covering the entire cell interior, an effective thermal short-circuit. Applied heat input of order 1 W to the bottom plate results in simultaneous heating of the entire cell: this physical process can be viewed, at least approximately, as a series of subsequent equilibrium states, until upon reaching the superfluid transition the non-equilibrium processes described in our previous study [Proc. Nat. Acad. Sci. USA 110, 8036 (2013)] are fully recovered. Published by AIP Publishing.

Název v anglickém jazyce

Convective heat transport in two-phase superfluid/ vapor He-4 system

Popis výsledku anglicky

We have recently shown that under certain cryogenic conditions heat can flow from a colder but constantly heated body to a hotter but constantly cooled body. Specifically, we have provided experimental evidence that heat flows through normal liquid and gaseous phases of 4He from the constantly heated, but cooler, bottom plate of a Rayleigh-Benard convection cell to its hotter, but constantly cooled, top plate. Here we report results of a modified experiment, where the bottom normal liquid helium layer is replaced by superfluid 4He, providing, together with a superfluid film covering the entire cell interior, an effective thermal short-circuit. Applied heat input of order 1 W to the bottom plate results in simultaneous heating of the entire cell: this physical process can be viewed, at least approximately, as a series of subsequent equilibrium states, until upon reaching the superfluid transition the non-equilibrium processes described in our previous study [Proc. Nat. Acad. Sci. USA 110, 8036 (2013)] are fully recovered. Published by AIP Publishing.

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

<a href="/cs/project/GA17-03572S" target="_blank" >GA17-03572S: Zvláštnosti konvektivního proudění a přenosu tepla v kryogenním heliu</a><br>

Návaznosti

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

Rok uplatnění

2018

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

—

Svazek periodika

44

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

UA - Ukrajina

Počet stran výsledku

4

Strana od-do

1001-1004

Kód UT WoS článku

000449060800004

EID výsledku v databázi Scopus

2-s2.0-85056256968