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DY: Fachverband Dynamik und Statistische Physik

DY 28: Nonlinear Dynamics, Synchronization and Chaos - Part I

DY 28.9: Vortrag

Mittwoch, 18. März 2015, 11:45–12:00, BH-N 128

Coupled organ pipes - Numerical investigations and new synchronization experiments — •Jost Leonhardt Fischer¹, Rolf Bader¹, and Markus Abel^2,3 — 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.