Results 21 to 30 of about 22,939,027 (338)

Spectral proper orthogonal decomposition and resolvent analysis of near-wall coherent structures in turbulent pipe flows [PDF]

open access: greenJournal of Fluid Mechanics, 2020
Direct numerical simulations, performed with a high-order spectral-element method, are used to study coherent structures in turbulent pipe flow at friction Reynolds numbers $Re_{\tau } = 180$ and $550$.
Leandra I. Abreu   +4 more
openalex   +3 more sources

Analysis of an Abstract Delayed Fractional Integro-Differential System via the α-Resolvent Operator

open access: goldAxioms
This paper explores the mild solutions of partial impulsive fractional integro-differential systems of order ...
Ishfaq Khan   +3 more
doaj   +2 more sources

Experiments and Modeling of a Compliant Wall Response to a Turbulent Boundary Layer with Dynamic Roughness Forcing

open access: yesFluids, 2021
The response of a compliant surface in a turbulent boundary layer forced by a dynamic roughness is studied using experiments and resolvent analysis. Water tunnel experiments are carried out at a friction Reynolds number of Reτ≈410, with flow and surface ...
David P. Huynh   +2 more
doaj   +1 more source

Randomized resolvent analysis

open access: yesPhysical Review Fluids, 2020
Performing global resolvent analysis for high-Reynolds-number turbulent flow calls for the handling of a large discrete operator. Even though such large operator is required in the analysis, most applications of resolvent analysis extracts only a few dominant resolvent response and forcing modes. Here, we consider the use of randomized numerical linear
Jean Hélder Marques Ribeiro   +2 more
openaire   +3 more sources

A Complete Review of the General Quartic Equation with Real Coefficients and Multiple Roots

open access: yesMathematics, 2022
This paper presents a general analysis of all the quartic equations with real coefficients and multiple roots; this analysis revealed some unknown formulae to solve each kind of these equations and some precisions about the relation between these ones ...
Mauricio Chávez-Pichardo   +4 more
doaj   +1 more source

A Note on Approximate Controllability of Fractional Semilinear Integrodifferential Control Systems via Resolvent Operators

open access: yesFractal and Fractional, 2022
This article primarily focuses on the approximate controllability of fractional semilinear integrodifferential equations using resolvent operators. Two alternative sets of necessary requirements have been studied.
Velusamy Vijayakumar   +6 more
doaj   +1 more source

On generalized Yosida inclusion problem with application

open access: yesResults in Control and Optimization, 2023
Herein, a generalized Yosida inclusion problem involving Φ-relaxed co-accretive mapping is investigated. The resolvent and analogous generalized Yosida approximation operator is explicated and its characteristics are outlined.
Mohammad Akram
doaj   +1 more source

Time-resolved burst variance analysis

open access: yesBiophysical Reports, 2023
Quantifying biomolecular dynamics has become a major task of single-molecule fluorescence spectroscopy methods. In single-molecule Förster resonance energy transfer (smFRET), kinetic information is extracted from the stream of photons emitted by attached donor and acceptor fluorophores.
Terterov, Ivan   +3 more
openaire   +3 more sources

On the Practicality of the Analytical Solutions for all Third- and Fourth-Degree Algebraic Equations with Real Coefficients

open access: yesMathematics, 2023
In order to propose a deeper analysis of the general quartic equation with real coefficients, the analytical solutions for all cubic and quartic equations were reviewed here; then, it was found that there can only be one form of the resolvent cubic that ...
Mauricio Chávez-Pichardo   +4 more
doaj   +1 more source

Convergence Analysis for Generalized Yosida Inclusion Problem with Applications

open access: yesMathematics, 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   +4 more
doaj   +1 more source

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