Dresden 2009 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
DY: Fachverband Dynamik und Statistische Physik
DY 12: Poster I
DY 12.8: Poster
Tuesday, March 24, 2009, 14:30–16:30, P1A
Dynamics of turbulent structures in a Rayleigh-Bénard-system — •Michael Peters and Michael Langner — Uni Oldenburg, Deutschland
Abstract: Langevin analysis of a time series essentially serves to work out the underlying deterministic law of the stochastic dynamical system considered. This method is applied to a measured time series of a Rayleigh-Bénard convection experiment in the turbulent region. The experimental setup consists of a water-filled cylindrical vessel heated from below. At the Rayleigh number Ra=6.8×109 a roll convection is observed with stochastic reorientations of the roll axis. The time series refers to the measurement of the vertical velocity component at a given point near the cylinder wall. The analysis of the corresponding one-dimensional Langevin equation reveals a deterministic double-well potential.