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11:45
15 mins
DNS of inertial wave attractors in a librating annulus with height-dependent gap width
Marten Klein, Abouzar Ghasemi Varnamkhasti, Torsten Seelig, Ion Dan Borcia, Uwe Harlander, Andreas Will
Session: Geophysical and astrophysical turbulence 1
Session starts: Thursday 27 August, 10:30
Presentation starts: 11:45
Room: Room C
Marten Klein (LS Umweltmeteorologie, BTU Cottbus - Senftenberg)
Abouzar Ghasemi Varnamkhasti (LS Umweltmeteorologie, BTU Cottbus - Senftenberg)
Torsten Seelig (LS Strömungsmechanik und Aerodynamik, BTU Cottbus - Senftenberg)
Ion Dan Borcia (LS Strömungsmechanik und Aerodynamik, BTU Cottbus - Senftenberg)
Uwe Harlander (LS Strömungsmechanik und Aerodynamik, BTU Cottbus - Senftenberg)
Andreas Will (LS Umweltmeteorologie, BTU Cottbus - Senftenberg)
Abstract:
Direct numerical simulations (DNS) of inertial wave attractors have been carried out in a librating Taylor-Couette system with broken mirror symmetry in the radial-axial cross-section. The inertial wave excitation mechanism and its localisation at the edges was clarified by applying boundary layer theory. Additional resonance peaks in the simulated response spectra were found to agree with low-order wave attractors obtained by geometric ray tracing. Numerics and theory are in qualitative agreement with recent lab experiments.