Schneider, Kai
Farge, Marie
2005-12-01
We present direct numerical simulations of two-dimensional decaying turbulence at initial Reynolds number 5×104 in a circular container with no-slip boundary conditions. Starting with random initial conditions the flow rapidly exhibits self-organization into coherent vortices. We study their formation and the role of the viscous boundary layer on the production and decay of integral quantities. The no-slip wall produces vortices which are injected into the bulk flow and tend to compensate the enstrophy dissipation. The self-organization of the flow is reflected by the transition of the initially Gaussian vorticity probability density function (PDF) towards a distribution with exponential tails. Because of the presence of coherent vortices the pressure PDF become strongly skewed with exponential tails for negative values.
https://doi.org/10.1103/physrevlett.95.244502
oai:zenodo.org:53083
Zenodo
info:eu-repo/semantics/openAccess
Other (Open)
Physical Review Letters, 95(24), (2005-12-01)
Decaying Two-Dimensional Turbulence in a Circular Container
info:eu-repo/semantics/article