Results 11 to 20 of about 28,261 (286)

A data–driven sensibility tool for flow control based on resolvent analysis

Results in Engineering
This study presents a novel application of data-driven resolvent analysis algorithm for flow control. The objective is to identify key coherent structures connected to regions of the flow that are highly sensitive to structural changes.
E. Lazpita, J. Garicano-Mena, G. Paniagua, S. Le Clainche, E. Valero   +4 more
doaj   +3 more sources

An invitation to resolvent analysis

Theoretical and Computational Fluid Dynamics
AbstractResolvent 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 can be revealed in terms of a pair of forcing and response modes and the associated energy gains (amplification magnitude) at a given frequency. The linear relationship
Rolandi, Laura Victoria, Ribeiro, Jean Hélder Marques, Yeh, Chi-An, Taira, Kunihiko   +3 more
openaire   +4 more sources

Efficient harmonic resolvent analysis via time stepping

Theoretical and Computational Fluid Dynamics
We present an extension of the RSVD-$Δt$ algorithm initially developed for resolvent analysis of statistically stationary flows to handle harmonic resolvent analysis of time-periodic flows. The harmonic resolvent operator, as proposed by \citet{Padovanetal20}, characterizes the linearized dynamics of time-periodic flows in the frequency domain, and its
Farghadan, Ali, Jung, Junoh, Bhagwat, Rutvij, Towne, Aaron   +3 more
openaire   +4 more sources

Optimal eddy viscosity for resolvent-based models of coherent structures in turbulent jets [PDF]

, 2021
Response modes computed via linear resolvent analysis of a turbulent mean-flow field have been shown to qualitatively capture characteristics of the observed turbulent coherent structures in both wall-bounded and free shear flows.
Colonius, Tim, Pickering, Ethan, Rigas, Georgios, Schmidt, Oliver T., Sipp, Denis   +4 more
core   +3 more sources

Time-resolved force distribution analysis [PDF]

BMC Biophysics, 2013
Biomolecules or other complex macromolecules undergo conformational transitions upon exposure to an external perturbation such as ligand binding or mechanical force. To follow fluctuations in pairwise forces between atoms or residues during such conformational changes as observed in Molecular Dynamics (MD) simulations, we developed Time-Resolved Force ...
Costescu, B., Gräter, F.
openaire   +3 more sources

Resolvent analysis of turbulent channel flow with manipulated mean velocity profile

Journal of Fluid Science and Technology, 2020
Using the resolvent analysis, we investigate how the near-wall mode primarily responsible for the friction drag is amplified or suppressed depending on the shape of the mean velocity profile of a turbulent channel flow.
Riko UEKUSA, Aika KAWAGOE, Yusuke NABAE, Koji FUKAGATA   +3 more
doaj   +1 more source

Convergence Analysis for Generalized Yosida Inclusion Problem with Applications

Mathematics, 2023
A new generalized Yosida inclusion problem, involving A-relaxed co-accretive mapping, is introduced. The resolvent and associated generalized Yosida approximation operator is construed and a few of its characteristics are discussed.
Mohammad Akram, Mohammad Dilshad, Aysha Khan, Sumit Chandok, Izhar Ahmad   +4 more
doaj   +1 more source

Resolvent analysis of a finite wing in transonic flow

Flow, 2023
Shock waves interacting with turbulent boundary layers on wings can result first in self-sustained flow unsteadiness and eventually in structural vibration.
Jelle Houtman, Sebastian Timme, Ati Sharma   +2 more
doaj   +1 more source

Stability and Convergence Analysis for Set-Valued Extended Generalized Nonlinear Mixed Variational Inequality Problems and Generalized Resolvent Dynamical Systems

Journal of Mathematics, 2021
In this paper, we study a set-valued extended generalized nonlinear mixed variational inequality problem and its generalized resolvent dynamical system. A three-step iterative algorithm is constructed for solving set-valued extended generalized nonlinear
Iqbal Ahmad, Zahoor Ahmad Rather, Rais Ahmad, Ching-Feng Wen   +3 more
doaj   +1 more source

Lift-up, Kelvin-Helmholtz and Orr mechanisms in turbulent jets [PDF]

, 2020
Three amplification mechanisms present in turbulent jets, namely lift-up, Kelvin–Helmholtz and Orr, are characterized via global resolvent analysis and spectral proper orthogonal decomposition (SPOD) over a range of Mach numbers.
Cavalieri, André V. G., Colonius, Tim, Nogueira, Petrônio A. S., Pickering, Ethan, Rigas, Georgios, Schmidt, Oliver T.   +5 more
core   +2 more sources