Wave number selection under the action of accelerated rotation

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http://hdl.handle.net/10138/303561

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Krivonosova , O , Zhilenko , D & Gritsevich , M 2019 , Wave number selection under the action of accelerated rotation . in L Shchur (ed.) , INTERNATIONAL CONFERENCE ON COMPUTER SIMULATION IN PHYSICS AND BEYOND . , 012035 , Journal of Physics Conference Series , vol. 1163 , IOP Publishing , Bristol , International Conference on Computer Simulation in Physics and Beyond (CSP) , Moscow , Russian Federation , 24/09/2018 . https://doi.org/10.1088/1742-6596/1163/1/012035

Titel: Wave number selection under the action of accelerated rotation
Författare: Krivonosova, O.; Zhilenko, D.; Gritsevich, M.
Medarbetare: Shchur, L
Upphovmannens organisation: Department of Physics
Utgivare: IOP Publishing
Datum: 2019
Språk: eng
Sidantal: 6
Tillhör serie: INTERNATIONAL CONFERENCE ON COMPUTER SIMULATION IN PHYSICS AND BEYOND
Tillhör serie: Journal of Physics Conference Series
ISSN: 1742-6588
DOI: https://doi.org/10.1088/1742-6596/1163/1/012035
Permanenta länken (URI): http://hdl.handle.net/10138/303561
Abstrakt: Unsteady viscous incompressible flows in a spherical layer due to an increase in the rotation velocity of the inner sphere with constant acceleration are investigated. The acceleration starts at the Reynolds numbers Re corresponding to a stationary flow and ends at Re higher than the stability limit of the stationary flow, whereupon the rotation velocity of the inner sphere remains constant. The outer sphere is fixed and the spherical layer thickness is equal to the inner sphere radius. The inner sphere acceleration effect is studied on both the formation of one of two possible secondary-flow structures after the acceleration has been stopped, namely, traveling azimuthal waves with wavenumbers of 3 or 4, and on the change in the flow structure during the action of the acceleration. It is shown that not only an increase in the acceleration but also a decrease in Re corresponding to the acceleration onset can lead to an increase in the deviation of the instantaneous velocity profiles from their stationary values and can be accompanied by a variation in the secondary flow wavenumber.
Subject: TAYLOR-VORTEX FLOW
INNER-SPHERE
STATE SELECTION
114 Physical sciences
113 Computer and information sciences
Referentgranskad: Ja
Licens: cc_by
Användningsbegränsning: openAccess
Parallelpublicerad version: publishedVersion


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