Dynamics of quantum turbulence in axially rotating thermal counterflow

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F24%3A00599448" target="_blank" >RIV/68081731:_____/24:00599448 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/24:10494310

Result on the web

<a href="https://pubs.aip.org/aip/pof/article/36/10/105121/3315391/Dynamics-of-quantum-turbulence-in-axially-rotating" target="_blank" >https://pubs.aip.org/aip/pof/article/36/10/105121/3315391/Dynamics-of-quantum-turbulence-in-axially-rotating</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0227282" target="_blank" >10.1063/5.0227282</a>

Result language

angličtina

Original language name

Dynamics of quantum turbulence in axially rotating thermal counterflow

Original language description

Generation, statistically steady state, and temporal decay of axially rotating thermal counterflow of superfluid 4He (He II) in a square channel is probed using the second sound attenuation technique, measuring the density of quantized vortex lines. The array of rectilinear quantized vortices created by rotation strongly affects the development of quantum turbulence (i.e., turbulence strongly affected by the presence of quantized vortices). At relatively slow angular velocities, the type of instability responsible for the destruction of the laminar counterflow qualitatively changes: the growth of seed vortex loops pinned on the channel wall becomes gradually replaced by the growth due to Donnelly-Glaberson instability, which leads to rapid growth of helical Kelvin waves on vortices parallel with applied counterflow. The initial transient growth of vortex line density that follows the sudden start of the counterflow appears self-similar, linear in dimensionless time, Omega t. We show numerically that Kelvin waves of sufficiently strong amplitude reorient the vortices into more flattened shapes, which grow similarly to a free vortex ring. The observed steady state vortex line density at sufficiently high counterflow velocity and its early temporal decay after the counterflow is switched off are not appreciably affected by rotation. It is striking, however, that although the steady state of rotating counterflow is very different from rotating classical grid-generated turbulence, the late temporal decay of both displays similar features: the decay exponent decreases with the rotation rate Omega from3/2 toward approximately0.7, typical for two-dimensional turbulence, consistent with the transition to bidirectional cascade. (c) 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND) license

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Physics of Fluids

ISSN

1070-6631

e-ISSN

1089-7666

Volume of the periodical

36

Issue of the periodical within the volume

10

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

105121

UT code for WoS article

001328568900046

EID of the result in the Scopus database

2-s2.0-85205971189