Self-similar mechanisms in wall turbulence studied using resolvent analysis [PDF]
Journal of Fluid Mechanics, 2022 Self-similarity of wall-attached coherent structures in a turbulent channel at $Re_\tau =543$ is explored by means of resolvent analysis. In this modelling framework, coherent structures are understood to arise as a response of the linearised mean-flow ...
Ugur Karban +4 more
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On the role of eddy viscosity in resolvent analysis of turbulent jets [PDF]
Journal of Fluid MechanicsThis study presents an approach to investigate the role of eddy viscosity in linearized mean-field analysis of broadband turbulent flows. The procedure is based on spectral proper orthogonal decomposition (SPOD), resolvent analysis and the energy budget ...
Jakob G. R. von Saldern +3 more
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An analysis on the approximate controllability of neutral impulsive stochastic integrodifferential inclusions via resolvent operators [PDF]
Heliyon, 2023 This article focuses on the approximate controllability of impulsive neutral stochastic integrodifferential inclusions in Hilbert spaces. We used resolvent operators, fixed point approaches, and semigroup theory to achieve the article's main results ...
Yong-Ki Ma +4 more
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Efficient harmonic resolvent analysis via time stepping [PDF]
Theoretical and Computational Fluid Dynamics, 2023 We present an extension of the RSVD-Δt\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt ...
Ali Farghadan +3 more
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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 +3 more
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On non-normality and classification of amplification mechanisms in stability and resolvent analysis [PDF]
, 2017 We seek to quantify non-normality of the most amplified resolvent modes and predict their features based on the characteristics of the base or mean velocity profile.
Dawson, Scott T. M. +3 more
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Resolvent analysis of turbulent flow laden with low-inertia particles [PDF]
Journal of Fluid MechanicsWe extend the resolvent framework to two-phase flows with low-inertia particles. The particle velocities are modelled using the equilibrium Eulerian model. We analyse the turbulent flow in a vertical pipe with Reynolds number of $5300$ (based on diameter
Rasmus Korslund Schlander +2 more
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Acoustic response of turbulent cavity flow using resolvent analysis [PDF]
The Physics of Fluids, 2021 Fluid-acoustic interactions are important in a variety of applications, and typically result in adverse effects. We analyze the influence of Mach number on such interactions and their input-output characteristics by combining resolvent analysis with Doak’
Qiong Liu, Datta V. Gaitonde
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Triglobal resolvent-analysis-based control of separated flows around low-aspect-ratio wings [PDF]
Journal of Fluid MechanicsWe perform direct numerical simulations of actively controlled laminar separated wakes around low-aspect-ratio wings with two primary goals: (i) reducing the size of the separation bubble and (ii) attenuating the wing tip vortex.
Jean Hélder Marques Ribeiro +1 more
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Sparse space–time resolvent analysis for statistically stationary and time-varying flows [PDF]
Journal of Fluid MechanicsResolvent analysis provides a framework to predict coherent spatio-temporal structures of the largest linear energy amplification, through a singular value decomposition (SVD) of the resolvent operator, obtained by linearising the Navier–Stokes equations
Barbara Lopez-Doriga +3 more
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