Physics – Fluid Dynamics
Scientific paper
2007-02-19
Phys. Rev. Lett. 99, 054101 (2007)
Physics
Fluid Dynamics
Improved model, additional results and figures, accepted in PRL
Scientific paper
10.1103/PhysRevLett.99.054101
We present an experimental study of a turbulent von K\'arm\'an flow produced in a cylindrical container using two propellers. The mean flow is stationary up to $Re = 10^4$, where a bifurcation takes place. The new regime breaks some symmetries of the problem, and is time-dependent. The axisymmetry is broken by the presence of equatorial vortices with a precession movement, being the velocity of the vortices proportional to the Reynolds number. The reflection symmetry through the equatorial plane is broken, and the shear layer of the mean flow appears displaced from the equator. These two facts appear simultaneously. In the exact counterrotating case, a bistable regime appears between both mirrored solutions and spontaneous reversals of the azimuthal velocity are registered. This evolution can be explained using a three-well potential model with additive noise. A regime of forced periodic response is observed when a very weak input signal is applied.
Burguete Javier
la Torre Alberto de
No associations
LandOfFree
Slow dynamics in a turbulent von Kármán swirling flow does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Slow dynamics in a turbulent von Kármán swirling flow, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slow dynamics in a turbulent von Kármán swirling flow will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-567272