Exploració per autor "Mellibovsky Elstein, Fernando"
Ara es mostren els items 7-26 de 46
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Characteristic spanwise length scales of streamwise vortical structures in the wake of a circular cylinder at Re = 1500 measured via global and local approaches
(Elsevier, 2023-01-30)
Article
Accés restringit per política de l'editorialWake characteristics of the flow past a circular cylinder are analysed in detail at Reynolds number Re = 1500 via direct numerical simulation. A periodic spanwise domain of length 1.5pD has been found to yield correct ... -
Characterization of three-dimensional vortical structures in the wake past a circular cylinder in the transitional regime
(2020)
Article
Accés obertThe flow past a circular cylinder in the transitional regime at Re = 2000 has been thoroughly investigated via well resolved direct numerical simulation with a spectral element code. Spanwise periodic boundary conditions ... -
Dynamics on the pipe flow critical threshold
(2009-07)
Text en actes de congrés
Accés restringit per política de l'editorial -
Edge state in pipe flow experiments
(2012-05-21)
Article
Accés obertRecent numerical studies suggest that in pipe and related shear flows, the region of phase space separating laminar from turbulent motion is organized by a chaotic attractor, called an edge state, which mediates the ... -
El enigma de Osborne Reynolds
(2010-03-01)
Article
Accés restringit per política de l'editorialAunque se sigue desconociendo por qué un fl uido conducido por una tubería se vuelve turbulento, se ha dado un paso importante hacia la resolución del problema, formulado hace ya más de 125 años -
El problema de Reynolds: transició subcrítica a la turbulència
(2008-12-30)
Article
Accés obertFa 125 anys, Osborne Reynolds, matemàtic i professor d’enginyeria de la Universitat de Manchester, va publicar el seu treball experimental i teòric sobre la transició a la turbulència de fluids en moviment dins de canonades. ... -
Emergence of spatio-temporal dynamics from exact coherent solutions in pipe flow
(2016-08-12)
Article
Accés obertTurbulent-laminar patterns are ubiquitous near transition in wall-bounded shear flows. Despite recent progress in describing their dynamics in analogy to non-equilibrium phase transitions, there is no theory explaining ... -
Una Experiencia de unificación de asignaturas para desplegar PBL (y las quejas que originó)
(Universitat Jaume I. Escola Superior de Tecnologia i Ciències Experimentals, 2013-07-10)
Text en actes de congrés
Accés obertEn esta ponencia se describen los aspectos esenciales de una experiencia de unificación de parejas de asignaturas con el objetivo de crear un escenario más adecuado para el despliegue de Aprendizaje Basado en Proyectos. ... -
Extensional channel flow revisited: a dynamical systems perspective
(2017-06-07)
Article
Accés obertExtensional self-similar flows in a channel are explored numerically for arbitrary stretching–shrinking rates of the confining parallel walls. The present analysis embraces time integrations, and continuations of steady ... -
Fluidic oscillators, feedback channel effect under compressible flow conditions
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-09-01)
Article
Accés obertFluidic oscillators are often used to modify the forces fluid generates on any given bluff body; they can also be used as flow, pressure or acoustic sensors, with each application requiring a particular oscillator ... -
Fold-pitchfork bifurcation for maps with Z(2) symmetry in pipe flow
(2013-07-11)
Article
Accés obertThis study aims to provide a better understanding of recently identified transition scenarios exhibited by traveling wave solutions in pipe flow. This particular family of solutions are invariant under certain reflectional ... -
From travelling waves to mild chaos: a supercritical bifurcation cascade in pipe flow
(2012-10-25)
Article
Accés restringit per política de l'editorialWe study numerically a succession of transitions in pipe Poiseuille flow that leads from simple travelling waves to waves with chaotic time-dependence. The waves at the origin of the bifurcation cascade possess a shift-reflect ... -
Fully nonlinear mode competition in magnetised Taylor-Couette flow
(2020-08-25)
Article
Accés obertWe study the nonlinear mode competition of various spiral instabilities in magnetised Taylor-Couette flow. The resulting finite-amplitude mixed-mode solution branches are tracked using the annular-parallelogram periodic ... -
Histeretical behaviour of two-dimensional vortex shedding past the NACA0012 airfoil at ultra-low Reynolds number
(2022)
Text en actes de congrés
Accés obertWe unfold the complex transition route from steady to chaotic dynamics of the two-dimensional flow past the NACA0012 airfoil upon increasing the angle of attack a at the ultra-low Reynolds number Re = 5300. Hopf, forward ... -
Instability mechanisms and transition scenarios of spiral turbulence in Taylor-Couette flow
(2009-10)
Article
Accés obertAlternating laminar and turbulent helical bands appearing in shear flows between counterrotating cylinders are accurately computed and the near-wall instability phenomena responsible for their generation identified for the ... -
Large eddy simulation of optimal synthetic jet actuation on a SD7003 airfoil in post-stall conditions
(2022-08)
Article
Accés obertAerodynamic performances may be optimised by the appropriate tuning of Active Flow Control (AFC) parameters. For the first time, we couple Genetic Algorithms (GA) with an unsteady Reynolds-Averaged Navier-Stokes (RANS) ... -
Mean structure of the supercritical turbulent spiral in Taylor–Couette flow
(Royal Society, 2023-03-13)
Article
Accés obertThe large-scale laminar/turbulent spiral patterns that appear in the linearly unstable regime of counter-rotating Taylor–Couette flow are investigated from a statistical perspective by means of direct numerical simulation. ... -
NACA 2412 performance modification via using AFC
(2017)
Text en actes de congrés
Accés restringit per política de l'editorialThe NACA 2412 profile was numerically studied via employing 2D-DNS and implementing Active Flow Control (AFC), the Reynolds number considered was 6757, being the angle of attack of 8º. Initially, the basic flow without ... -
New applications of numerical simulation based on lattice Boltzmann method at high Reynolds numbers
(2020-03-15)
Article
Accés restringit per política de l'editorialIn order to study the flow behavior at high Reynolds numbers, two modified models, known as the multiple-relaxation-time lattice Boltzmann method (MRT-LBM) and large-eddy-simulation lattice Boltzmann method (LES-LBM), have ... -
Numerical investigation on the flow around a square cylinder with an upstream splitter plate at low Reynolds numbers
(2020-03-13)
Article
Accés obertThe present study focuses on the flow over a 2D square cylinder with a plate placed in front of it. An in-house code using the lattice Boltzmann method was employed for all the simulations presented. Few cases were simulated ...
