Dynamics of vortex line density and heat transfer processes in superfluid helium

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Dynamics of vortex line density and heat transfer processes in superfluid helium. / Kondaurova, L. P.

In: Low Temperature Physics, Vol. 44, No. 1, 01.01.2018, p. 29-35.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{3a88f73f976c457aa78de4128387a365,

title = "Dynamics of vortex line density and heat transfer processes in superfluid helium",

abstract = "Three dynamics equations for vortex line density are analyzed. It is shown that the Vinen equation gives the values of vortex tangle development time in the case of a constant counterflow more accurately than other alternative equations. Within the system of equations of superfluid turbulence hydrodynamics, obtained using a phenomenological approach, helium boiling times as a function of heat flux density are found, using alternative dynamics equations of vortex tangle density. Unlike the experiments in which different dependences of boiling time tboil on the heat flux density Q (tboil Qn, -4 ≤ n ≤ -2) are observed, in this case we get only a power-law dependence with an exponent of n = -4. We obtain a velocity distribution of the normal component along the channel, and the temperature dependence of the time near the heater. We conduct a comparison against the numerical and experimental results that were previously obtained in literature.",

keywords = "NORMAL-FLUID TURBULENCE, II THERMAL COUNTERFLOW, LIQUID-HELIUM, MUTUAL FRICTION, VISUALIZATION, HEII, FILM, CONDUCTIVITY, RECONNECTION, TRANSITION",

author = "Kondaurova, {L. P.}",

note = "Publisher Copyright: {\textcopyright} 2018 Author(s).",

year = "2018",

month = jan,

day = "1",

doi = "10.1063/1.5020893",

language = "English",

volume = "44",

pages = "29--35",

journal = "Low Temperature Physics",

issn = "1063-777X",

publisher = "American Institute of Physics",

number = "1",

}

RIS

TY - JOUR

T1 - Dynamics of vortex line density and heat transfer processes in superfluid helium

AU - Kondaurova, L. P.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Three dynamics equations for vortex line density are analyzed. It is shown that the Vinen equation gives the values of vortex tangle development time in the case of a constant counterflow more accurately than other alternative equations. Within the system of equations of superfluid turbulence hydrodynamics, obtained using a phenomenological approach, helium boiling times as a function of heat flux density are found, using alternative dynamics equations of vortex tangle density. Unlike the experiments in which different dependences of boiling time tboil on the heat flux density Q (tboil Qn, -4 ≤ n ≤ -2) are observed, in this case we get only a power-law dependence with an exponent of n = -4. We obtain a velocity distribution of the normal component along the channel, and the temperature dependence of the time near the heater. We conduct a comparison against the numerical and experimental results that were previously obtained in literature.

AB - Three dynamics equations for vortex line density are analyzed. It is shown that the Vinen equation gives the values of vortex tangle development time in the case of a constant counterflow more accurately than other alternative equations. Within the system of equations of superfluid turbulence hydrodynamics, obtained using a phenomenological approach, helium boiling times as a function of heat flux density are found, using alternative dynamics equations of vortex tangle density. Unlike the experiments in which different dependences of boiling time tboil on the heat flux density Q (tboil Qn, -4 ≤ n ≤ -2) are observed, in this case we get only a power-law dependence with an exponent of n = -4. We obtain a velocity distribution of the normal component along the channel, and the temperature dependence of the time near the heater. We conduct a comparison against the numerical and experimental results that were previously obtained in literature.

KW - NORMAL-FLUID TURBULENCE

KW - II THERMAL COUNTERFLOW

KW - LIQUID-HELIUM

KW - MUTUAL FRICTION

KW - VISUALIZATION

KW - HEII

KW - FILM

KW - CONDUCTIVITY

KW - RECONNECTION

KW - TRANSITION

UR - http://www.scopus.com/inward/record.url?scp=85045943594&partnerID=8YFLogxK

U2 - 10.1063/1.5020893

DO - 10.1063/1.5020893

M3 - Article

AN - SCOPUS:85045943594

VL - 44

SP - 29

EP - 35

JO - Low Temperature Physics

JF - Low Temperature Physics

SN - 1063-777X

IS - 1

ER -

ID: 12846777