Efficient global resolvent analysis via the one-way Navier–Stokes equations

A Towne, G Rigas, O Kamal, E Pickering… - Journal of Fluid …, 2022 - cambridge.org
Resolvent analysis is a powerful tool for modelling and analysing transitional and turbulent
flows and, in particular, for approximating coherent flow structures. Despite recent …

An empirical model of noise sources in subsonic jets

U Karban, B Bugeat, A Towne, L Lesshafft… - Journal of Fluid …, 2023 - cambridge.org
Modelling the noise emitted by turbulent jets is made difficult by their acoustic inefficiency:
only a tiny fraction of the near-field turbulent kinetic energy is propagated to the far field as …

The generalised resolvent-based turbulence estimation with arbitrarily sampled measurements in time

A Ying, Z Li, L Fu - Journal of Fluid Mechanics, 2024 - cambridge.org
In this study, the resolvent-based estimation (RBE) is further generalised to cases with
arbitrarily sampled measurements in time, where the generalised RBE is denoted as GRBE …

The effect of flight on a turbulent jet: coherent structure eduction and resolvent analysis

IA Maia, L Heidt, E Pickering, T Colonius… - Journal of Fluid …, 2024 - cambridge.org
We study coherent structures in subsonic turbulent jets subject to a flight stream. A thorough
characterisation of the effects of a flight stream on the turbulent field was recently performed …

Galerkin spectral estimation of vortex-dominated wake flows

KJ Asztalos, A Almashjary, STM Dawson - Theoretical and Computational …, 2024 - Springer
We propose a technique for performing spectral (in time) analysis of spatially-resolved
flowfield data, without needing any temporal resolution or information. This is achieved by …

Wavepackets Driving Trailing Edge Noise. Part I–Direct Simulation and Experiments

Z Yuan, S Demange, S Jekosch, E Sarradj… - 30th AIAA/CEAS …, 2024 - arc.aiaa.org
The aim of present work is to investigate trailing-edge noise generation mechanisms to
improve prediction tools and control strategies. We focus on a NACA 0012 airfoil at 3 …

Distributions and correlation properties of offshore wind speeds and wind speed increments

SK Sim, P Maass, HE Roman - Boundary-Layer Meteorology, 2024 - Springer
We determine distributions and correlation properties of offshore wind speeds and wind
speed increments by analyzing wind data sampled with a resolution of one second for 20 …

Acoustic resolvent analysis of turbulent jets

B Bugeat, U Karban, A Agarwal, L Lesshafft… - … and Computational Fluid …, 2024 - Springer
We perform a resolvent analysis of a compressible turbulent jet, where the optimisation
domain of the response modes is located in the acoustic field, excluding the hydrodynamic …