Data-driven resolvent analysis

B Herrmann, PJ Baddoo, R Semaan… - Journal of Fluid …, 2021 - cambridge.org
Resolvent analysis identifies the most responsive forcings and most receptive states of a
dynamical system, in an input–output sense, based on its governing equations. Interest in …

Triglobal resolvent analysis of swept-wing wakes

JHM Ribeiro, CA Yeh, K Taira - Journal of Fluid Mechanics, 2023 - cambridge.org
Through triglobal resolvent analysis, we reveal the effects of wing tip and sweep angle on
laminar separated wakes over swept wings. For the present study, we consider wings with …

流体力学预解分析方法研究进展

袁昊, 寇家庆, 张伟伟 - 力学学报, 2024 - lxxb.cstam.org.cn
线性稳定性分析长期以来是揭示复杂流动机理的重要手段, 通过求解流动线性化算子的特征值
问题获得流动的直接模态及其频率, 增长率等信息. 然而其仅能描述系统微幅扰动随时间的指数 …

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 …

Improved convergence of the spectral proper orthogonal decomposition through time shifting

DCP Blanco, E Martini, K Sasaki… - Journal of Fluid …, 2022 - cambridge.org
Spectral proper orthogonal decomposition (SPOD) is an increasingly popular modal
analysis method in the field of fluid dynamics due to its specific properties: a linear system …

An invitation to resolvent analysis

LV Rolandi, JHM Ribeiro, CA Yeh, K Taira - … and Computational Fluid …, 2024 - Springer
Resolvent analysis is a powerful tool that can reveal the linear amplification mechanisms
between the forcing inputs and the response outputs about a base flow. These mechanisms …

Interaction and breakdown induced by multiple optimal disturbances in hypersonic boundary layer

P Guo, J Hao, CY Wen - Journal of Fluid Mechanics, 2023 - cambridge.org
The present paper finds that the coexistence of multiple primary instability waves may cause
a non-trivial nonlinear interaction and breakdown process, which has not been reported …

Wavelet-based resolvent analysis of non-stationary flows

E Ballouz, B Lopez-Doriga, STM Dawson… - Journal of Fluid …, 2024 - cambridge.org
This work introduces a formulation of resolvent analysis that uses wavelet transforms rather
than Fourier transforms in time. Under this formulation, resolvent analysis may extend to …

Scalable resolvent analysis for three-dimensional flows

A Farghadan, E Martini, A Towne - Journal of Computational Physics, 2024 - Elsevier
Resolvent analysis is a powerful tool for studying coherent structures in turbulent flows.
However, its application beyond canonical flows with symmetries that can be used to …

Nozzle dynamics and wavepackets in turbulent jets

O Kaplan, P Jordan, AVG Cavalieri… - Journal of Fluid …, 2021 - cambridge.org
We study a turbulent jet issuing from a cylindrical nozzle to characterise coherent structures
evolving in the turbulent boundary layer. The analysis is performed using data from a large …