no code implementations • 2 Dec 2020 • Matteo Mancinelli, Vincent Jaunet, Peter Jordan, Aaron Towne
Starting from the resonance model recently proposed by \cite{mancinelli2019screech}, where the upstream-travelling wave is a neutrally-stable guided jet mode, we here present a more complete linear-stability-based model for screech prediction.
Fluid Dynamics
no code implementations • 12 Nov 2020 • Filipe R. Amaral, André V. G. Cavalieri, Eduardo Martini, Peter Jordan, Aaron Towne
All models lead to accurate results up to the buffer-layer, but only using the true forcing statistics allows accurate estimation of large-scale log-layer structures, with significant correlation between the estimates and DNS results throughout the channel.
Fluid Dynamics
1 code implementation • 25 Aug 2020 • Eduardo Martini, Daniel Rodríguez, Aaron Towne, André V. G. Cavalieri
Resolvent analysis of the linearized Navier-Stokes equations provides useful insight into the dynamics of transitional and turbulent flows and can provide a model for the dominant coherent structures within the flow, particularly for flows with large gain separation.
Fluid Dynamics
1 code implementation • 16 Nov 2017 • Oliver T. Schmidt, Aaron Towne, Georgios Rigas, Tim Colonius, Guillaume A. Brès
Over a range of low frequencies and the first few azimuthal mode numbers, these jets exhibit a low-rank response characterized by Kelvin-Helmholtz (KH) type wavepackets associated with the annular shear layer up to the end of the potential core and that are excited by forcing in the very-near-nozzle shear layer.
Fluid Dynamics
1 code implementation • 15 Aug 2017 • Aaron Towne, Oliver T. Schmidt, Tim Colonius
We also establish a relationship between SPOD and dynamic mode decomposition (DMD); we show that SPOD modes are in fact optimally averaged DMD modes obtained from an ensemble DMD problem for stationary flows.
Fluid Dynamics
