Berlin 2005 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 34: Poster
DY 34.26: Poster
Montag, 7. März 2005, 15:30–18:00, Poster TU D
Noise-induced order and ratchet effect in a thermal convection loop — •Chol-Ung Choe1,2 and Hartmut Benner1 — 1Institut für Festkörperphysik, TU-Darmstadt — 2Department of Physics, University of Science Pyongyang, DPR Korea
We show analytically and experimentally that noise-induced order as well as ratchet effects are efficiently achieved by applying vertical and horizontal noise fluctuations on a thermal convection loop. The idea of our investigation is based on the observation that a thermal convection loop shows stability properties similar to those of the well-known Kapitza pendulum which can be stabilized or destabilized by rapid vibrations of its pivot. The mechanism of fast parametric modulation by regular oscillations could be extended to the case of irregular fluctuations.