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DY: Fachverband Dynamik und Statistische Physik
DY 28: Nonlinear Dynamics, Synchronization and Chaos - Part I
DY 28.9: Talk
Wednesday, March 18, 2015, 11:45–12:00, BH-N 128
Coupled organ pipes - Numerical investigations and new synchronization experiments — •Jost Leonhardt Fischer1, Rolf Bader1, and Markus Abel2,3 — 1Systematische Musikwissenschaft, Universität Hamburg, Deutschland — 2Institut für Physik und Astronomie, Universität Potsdam, Deutschland — 3Ambrosys GmbH, Potsdam, Deutschland
Motivated by recent synchronization experiments with slightly detuned organ pipes we show that mutual interaction between two organ pipes which lead to synchronization can be properly depicted by methods of numerical simulation. Therefore we integrated the fully compressible Navier-Stokes equations with suitable initial and boundary conditions using an LES-Model. This gives a deep insight into the fluiddynamical and aeroacoustical first principles of sound generation and sound radiation of organ pipes. Furthermore we show first results of new synchronization experiments with equally tuned pairs of organ pipes. We observed abrupt switching between anti- and in-phase synchronization, depending on the distance of the pipes, respectively the time delay of the coupling.