Now showing items 1-20 of 25

    • A mechanism for streamwise localisation of nonlinear waves in shear flows 

      Mellibovsky Elstein, Fernando; Meseguer Serrano, Álvaro (2015-09-01)
      Article
      Open Access
      We 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 ...
    • Bifurcations with imperfect SO(2) symmetry and pinning of rotating waves 

      Marqués Truyol, Francisco; Meseguer Serrano, Álvaro; Lopez, Juan M.; Pacheco, Jose Rafael; López Alonso, José Manuel (2013-04-08)
      Article
      Restricted access - publisher's policy
      Rotating 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 

      Mellibovsky Elstein, Fernando; Meseguer Serrano, Álvaro (2009-07)
      Conference report
      Restricted access - publisher's policy
    • El enigma de Osborne Reynolds 

      Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando (2010-03-01)
      Article
      Restricted access - publisher's policy
      Aunque 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 

      Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando (2008-12-30)
      Article
      Open Access
      Fa 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 

      Marqués Truyol, Francisco; Meseguer Serrano, Álvaro (2019-10-31)
      Article
      Open Access
      We 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 

      Marqués Truyol, Francisco; Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando; Weidman, Patrick (2017-06-07)
      Article
      Open Access
      Extensional 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 ...
    • Fold-pitchfork bifurcation for maps with Z(2) symmetry in pipe flow 

      Marqués Truyol, Francisco; Mellibovsky Elstein, Fernando; Meseguer Serrano, Álvaro (2013-07-11)
      Article
      Open Access
      This 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 

      Ayats López, Roger; Deguchi, Kengo; Mellibovsky Elstein, Fernando; Meseguer Serrano, Álvaro (2020-08-25)
      Article
      Restricted access - publisher's policy
      We 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 

      Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando; Àvila Cañellas, Marc; Marqués Truyol, Francisco (2009-10)
      Article
      Open Access
      Alternating 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 ...
    • Mode competition in cylindrical flows driven by sidewall oscillations 

      Panadès Guinart, Carles; Marqués Truyol, Francisco; Meseguer Serrano, Álvaro (2013-04)
      Article
      Open Access
      The 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 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2017-05-30)
      Exam
      Restricted access to the UPC academic community
    • Models Matemàtics de la Física | Final 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2019-06-06)
      Exam
      Restricted access to the UPC academic community
    • MODELS MATEMÀTICS DE LA FÍSICA | FINAL 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2018-05-31)
      Exam
      Restricted access to the UPC academic community
    • MODELS MATEMÀTICS DE LA FÍSICA | FINAL 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2016-06-02)
      Exam
      Restricted access to the UPC academic community
    • MODELS MATEMÀTICS DE LA FÍSICA | FINAL 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2020-06-15)
      Exam
      Restricted access to the UPC academic community
    • Models Matemàtics de la Física | Parcial 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2019-04-04)
      Exam
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    • MODELS MATEMÀTICS DE LA FÍSICA | PARCIAL 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2017-04-06)
      Exam
      Restricted access to the UPC academic community
    • MODELS MATEMÀTICS DE LA FÍSICA | PARCIAL 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2020-03-27)
      Exam
      Restricted access to the UPC academic community
    • MODELS MATEMÀTICS DE LA FÍSICA | PARCIAL 

      Meseguer Serrano, Álvaro (Universitat Politècnica de Catalunya, 2016-04-04)
      Exam
      Restricted access to the UPC academic community