Dataset to "flow stages during vortex decay in an impulsively stopped rotating cylinder"

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 $Re$. TechnicalRemarks: ------------------------------------------------------------------------------------------------------------------------ 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

Cite this as

Kaiser, Frieder (2023). Dataset: Dataset to "flow stages during vortex decay in an impulsively stopped rotating cylinder". https://doi.org/10.35097/1173

DOI retrieved: 2023

Additional Info

Field Value
Imported on August 4, 2023
Last update August 4, 2023
License CC BY-NC-ND 4.0 Attribution-NonCommercial-NoDerivs
Source https://doi.org/10.35097/1173
Author Kaiser, Frieder
Source Creation 2023
Publishers
Karlsruhe Institute of Technology
Production Year 2019
Publication Year 2023
Subject Areas
Name: Engineering