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  2. Dataset to "Flow stages during vortex decay in an impulsively stopped rotating cylinder"
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    Datenpaket: Dataset to "Flow stages during vortex decay in an impulsively stopped rotating cylinder"

    Alternativer Identifier:
    (KITopen-DOI) 10.5445/IR/1000094344
    Verwandter Identifier:
    -
    Ersteller/in:
    Kaiser, Frieder [Kaiser, Frieder]
    Beitragende:
    (Other)
    Frohnapfel, Bettina [Frohnapfel, Bettina]

    (Other)
    Kriegseis, Jochen https://orcid.org/0000-0002-2737-2539 [Kriegseis, Jochen]

    (Other)
    Rival, David E. [Rival, David E.]

    (Other)
    Ostilla-Monico, Rodolfo [Ostilla-Monico, Rodolfo]

    (Other)
    Gatti, Davide [Gatti, Davide]
    Titel:
    Dataset to "Flow stages during vortex decay in an impulsively stopped rotating cylinder"
    Weitere Titel:
    -
    Beschreibung:
    (Abstract) An infinite cylinder containing a fluid in solid body rotation (SBR) is impulsively stopped. The decay and self-organisation of the initial SBR due to the forming boundary layer and multiple transitions is addressed by means of direct numerical simulations for a wide range of Reynolds numbers. The flow undergoes five distinct flow stages during its decay, which are characterised by means of statistical evaluation. This database features statistics of four different spin-down simulations at different $Re$.
    (Technical Remarks) ------------------------------------------------------------------------------------------------------------------------ Statistics on spin down for different Re ------------------------------------------------------------------------------------------------------------------------ this database features: * statistics of four different spin-down simulations at different Re=\Omega R^2/\nu; * global volume-averaged data for turbulent kinetic engery (k), mean kinetic energy (K) and their budget equations; * temporal evolution of 1D quantities such as wall-shear stress, boundary-layer thickness; * temporal evolution of spatially (over z and \phi) averaged bulk data such as mean velocity, Reynolds-stresses etc.; * terms of the k and K budget equations as function of t and r. ------------------------------------------------------------------------------------------------------------------------ Acknowledgment: The financial support by the German Research Foundation (DFG) under Priority Programme SPP-1881 is greatly acknowledged. ------------------------------------------------------------------------------------------------------------------------ References: F. Kaiser, B. Frohnapfel, R. Ostilla-Monico, J. Kriegseis, D. E. Rival and D. Gatti (2019) "Flow stages during vortex decay in an impulsively stopped rotating cylinder", Journal of Fluid Mechanics, (to be submitted) ------------------------------------------------------------------------------------------------------------------------ Content: folders for different Re: Re3000, Re6000, Re12000, Re28000 each folder contains: tot.dat --> 1D data such as wall-velocity, boundary-layer thickness, volume average K, volume average k etc. t.dat --> time steps (spacing dt increases during late stages of decay) r.dat --> radial positions of the grid bulk --> folder: contains dat files for non-zero bulk quantities as functions of r and t. mean velocity, mean vorticity, velocity in wall units, Reynolds stresses mke --> folder: contains terms of the K budget equation as functions of r and t: K, production, dissipation, turbulent transport, viscous transport tke --> folder: contains terms of the TKE budget equation as functions of r and t: k, production, dissipation, turbulent transport, viscous transport, pressure diffusion Refer to the readme files in each subdirectory for further information on each database. ------------------------------------------------------------------------------------------------------------------------ Changelog: May-08-2019: database uploaded ------------------------------------------------------------------------------------------------------------------------ frieder.kaiser@kit.edu davide.gatti@kit.edu bettina.frohnapfel@kit.edu
    Schlagworte:
    transition to turbulence
    turbulent decay
    anisotropic turbulence
    curved-wall boundary layers
    Zugehörige Informationen:
    -
    Sprache:
    -
    Herausgeber/in:
    Karlsruhe Institute of Technology
    Erstellungsjahr:
    Fachgebiet:
    Engineering
    Objekttyp:
    Dataset
    Datenquelle:
    -
    Verwendete Software:
    -
    Datenverarbeitung:
    -
    Erscheinungsjahr:
    Rechteinhaber/in:
    Kaiser, Frieder
    Förderung:
    -
    Name Speichervolumen Metadaten Upload Aktion
    Status:
    Publiziert
    Eingestellt von:
    kitopen
    Erstellt am:
    Archivierungsdatum:
    2023-06-21
    Archivgröße:
    361,6 MB
    Archiversteller:
    kitopen
    Archiv-Prüfsumme:
    6784eb87f471c33ebcc42cf0ec2cbb56 (MD5)
    Embargo-Zeitraum:
    -