Results 41 to 50 of about 22,939,027 (338)
A second-order resolvent formulation for the analysis of turbulent flow structures
Comptes Rendus. Mécanique, 2023 An attempt to improve the accuracy of resolvent-based predictions by including velocity correlations in the linear model is developed here. Closure assumptions for unresolved nonlinearities are thus pushed back to a higher order.
Chevalier, Quentin +2 more
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Use of eddy viscosity in resolvent analysis of turbulent channel flow
Physical Review Fluids, 2023 The predictions obtained from resolvent analysis with and without an eddy viscosity model for turbulent channel flow at Re τ = 550 are compared to direct numerical simulation data to identify the scales and wave speeds for which resolvent analysis ...
S. Symon +3 more
semanticscholar +1 more source
Nonautonomous Dynamical Systems, 2023 In this work, we investigate the existence of mild solutions in the α\alpha -norm for a class of nonlocal integrodifferential equations. We employ the theory of resolvent operators introduced by R. Grimmer. The Leray-Schauder alternative is the principal
El Matloub Jaouad, Ezzinbi Khalil
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Efficient global resolvent analysis via the one-way Navier–Stokes equations [PDF]
Journal of Fluid Mechanics, 2021 Resolvent analysis is a powerful tool for modelling and analysing transitional and turbulent flows and, in particular, for approximating coherent flow structures. Despite recent algorithmic advances, computing resolvent modes for flows with more than one
A. Towne +4 more
semanticscholar +1 more source
Generalized Supersymmetric Quantum Mechanics and Reflectionless Fermion Bags in 1+1 Dimensions [PDF]
, 2001 We study static fermion bags in the 1+1 dimensional Gross-Neveu and Nambu-Jona-Lasinio models. It has been known, from the work of Dashen, Hasslacher and Neveu (DHN), followed by Shei's work, in the 1970's, that the self-consistent static fermion bags in
Feinberg, Joshua, Zee, A.
core +3 more sources
Flow control of a plunging cylinder based on resolvent analysis
Journal of Fluid Mechanics, 2023 We design an open-loop active flow control for separated flows around a plunging circular cylinder based on resolvent analysis. The cylinder is plunging at a Strouhal number of 0.36 and a Reynolds number of 500.
Ching-Te Lin, Min-Lin Tsai, H. Tsai
semanticscholar +1 more source
Wavelet-based resolvent analysis for statistically-stationary and temporally-evolving flows [PDF]
AIAA SCITECH 2023 Forum, 2022 This work introduces a formulation of resolvent analysis that uses wavelet transforms rather than Fourier transforms in time. This allows resolvent analysis to be extended to turbulent flows with non-stationary means in addition to statistically ...
E. Ballouz +3 more
semanticscholar +1 more source
Bounded, asymptotically stable, and L^{1} solutions of Caputo fractional differential equations [PDF]
Opuscula Mathematica, 2015 The existence of bounded solutions, asymptotically stable solutions, and \(L^1\) solutions of a Caputo fractional differential equation has been studied in this paper.
Muhammad N. Islam
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Schur functions and their realizations in the slice hyperholomorphic setting [PDF]
, 2011 we start the study of Schur analysis in the quaternionic setting using the theory of slice hyperholomorphic functions. The novelty of our approach is that slice hyperholomorphic functions allows to write realizations in terms of a suitable resolvent, the
A.H. Sayed +52 more
core +3 more sources
Journal of Fluid Mechanics, 2023 The potential of frequency-tuned surfaces as a passive control strategy for reducing drag in wall-bounded turbulent flows is investigated using resolvent analysis. These surfaces are considered to have geometries with impedances that permit transpiration
A. Jafari, B. McKeon, M. Arjomandi
semanticscholar +1 more source