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

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