Browsing by Author "Meseguer Serrano, Álvaro"
Now showing items 1-20 of 35
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A mechanism for streamwise localisation of nonlinear waves in shear flows
(2015-09-01)
Article
Open AccessWe present the complete unfolding of streamwise localisation in a paradigm of extended shear flows, namely two-dimensional plane Poiseuille flow. Exact solutions of the Navier-Stokes equations are computed numerically and ... -
Bifurcation analysis in the regularized four-sided cavity flow: equilibrium states in a D 2 -symmetric fluid system
(2024-06-11)
Article
Restricted access - publisher's policyIn this study, we investigate a handful of equilibrium states and their hydrodynamic stability for the incompressible flow in a square cavity driven by the tangential simultaneous motion of all of its lids at the same ... -
Bifurcations with imperfect SO(2) symmetry and pinning of rotating waves
(2013-04-08)
Article
Restricted access - publisher's policyRotating waves are periodic solutions in SO(2) equivariant dynamical systems. Their precession frequency changes with parameters and it may change sign, passing through zero. When this happens, the dynamical system is very ... -
Dynamics on the pipe flow critical threshold
(2009-07)
Conference report
Restricted access - publisher's policy -
El enigma de Osborne Reynolds
(2010-03-01)
Article
Restricted access - publisher's policyAunque 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
Open AccessFa 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. ... -
Extensional and torsional pipe flow
(2019-10-31)
Article
Open AccessWe study the dynamics of a viscous fluid confined within an elastic pipe that is being stretched and twisted in the axial and azimuthal directions, respectively. A comprehensive numerical exploration of self-similar flows ... -
Extensional channel flow revisited: a dynamical systems perspective
(2017-06-07)
Article
Open AccessExtensional 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 ... -
FÍSICA | Parcial 2Q
(Universitat Politècnica de Catalunya, 2024-03-19)
Exam
Restricted access to the UPC academic community -
Flows between orthogonally stretching parallel plates
(2021-02-01)
Article
Open AccessNavier–Stokes equilibrium solutions of a viscous fluid confined between two infinite parallel plates that can independently stretch or shrink in orthogonal directions are studied. It is assumed that the admissible solutions ... -
Fold-pitchfork bifurcation for maps with Z(2) symmetry in pipe flow
(2013-07-11)
Article
Open AccessThis 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 ... -
Fully nonlinear mode competition in magnetised Taylor-Couette flow
(2020-08-25)
Article
Open AccessWe 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 ... -
Instability mechanisms and transition scenarios of spiral turbulence in Taylor-Couette flow
(2009-10)
Article
Open AccessAlternating 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 ... -
Mean structure of the supercritical turbulent spiral in Taylor–Couette flow
(Royal Society, 2023-03-13)
Article
Open AccessThe 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. ... -
Mode competition in cylindrical flows driven by sidewall oscillations
(2013-04)
Article
Open AccessThe transition from a two-dimensional to three-dimensional flow in systems with spatial O(2) symmetry and spatiotemporal Z2 symmetry happens in many fluid systems, like wakes or periodically forced flows. In most of these ... -
MODELS MATEMÀTICS DE LA FÍSICA
(Universitat Politècnica de Catalunya, 2017-05-30)
Exam
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MODELS MATEMÀTICS DE LA FÍSICA | 2n PARCIAL
(Universitat Politècnica de Catalunya, 2023-06-01)
Exam
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MODELS MATEMÀTICS DE LA FÍSICA | 1r PARCIAL
(Universitat Politècnica de Catalunya, 2023-04-01)
Exam
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MODELS MATEMÀTICS DE LA FÍSICA | FINAL
(Universitat Politècnica de Catalunya, 2020-06-15)
Exam
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MODELS MATEMÀTICS DE LA FÍSICA | FINAL
(Universitat Politècnica de Catalunya, 2016-06-02)
Exam
Restricted access to the UPC academic community
