Ara es mostren els items 26-45 de 47

    • Mode competition in cylindrical flows driven by sidewall oscillations 

      Panadès Guinart, Carles; Marqués Truyol, Francisco; Meseguer Serrano, Álvaro (2013-04)
      Article
      Accés obert
      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 ...
    • Momento de inercia 

      Sanz, Clara; Marqués Truyol, Francisco; Calvete Manrique, Daniel (2018-07-04)
      Audiovisual
      Accés obert
      Este vídeo forma parte del MOOC "El lenguaje de la Ingeniería". Módulo de Física.
    • Nonlinear and detuning effects of the nutation angle in precessionally-forced rotating cylinder flow 

      Lopez Moscat, Juan Manuel; Marqués Truyol, Francisco (2016-06-16)
      Article
      Accés obert
      The flow in a rapidly rotating cylinder forced to precess through a nutation angle a is investigated numerically, keeping all parameters constant except a, and tuned to a triadic resonance at a = 1º. When increasing a, ...
    • Optimal harmonic response in a confined Bödewadt boundary layer flow 

      Younghae, Do; Lopez, Juan M.; Marqués Truyol, Francisco (2010-09-01)
      Article
      Accés obert
      The Bödewadt boundary layer flow on the stationary bottom end wall of a finite rotating cylinder is very sensitive to perturbations and noise. Axisymmetric radial waves propagating inward have been observed experimentally ...
    • Phase-locking flows between orthogonally stretching parallel plates 

      Wang, Baoying; Ayats López, Roger; Meseguer Serrano, Álvaro; Marqués Truyol, Francisco (2022-11-04)
      Article
      Accés obert
      In this paper, we explore the stability and dynamical relevance of a wide variety of steady, time-periodic, quasiperiodic, and chaotic flows arising between orthogonally stretching parallel plates. We first explore the ...
    • Pinning of rotating waves to defects in finite Taylor-Couette flow 

      Pacheco, J. R.; López, J. M.; Marqués Truyol, Francisco (2011-01-10)
      Article
      Accés obert
      Experiments in small aspect-ratio Taylor–Couette flows have reported the presence of a band in parameter space where rotating waves become steady non-axisymmetric solutions (a pinning effect) via infinite-period bifurcations. ...
    • Precession of a rapidly rotating cylinder flow: traverse through resonance 

      Marqués Truyol, Francisco; López Moscat, Juan Manuel (2015-10-06)
      Article
      Accés restringit per política de l'editorial
      Recent experiments using a rapidly rotating and precessing cylinder have shown that for specific values of the precession rate, aspect ratio and tilt angle, sudden catastrophic transitions to turbulence occur. Even if the ...
    • Prediction of image partitions using Fourier descriptors: application to segmentation-based coding schemes 

      Marqués Truyol, Francisco; Gasull Llampallas, Antoni (1998-04)
      Article
      Accés obert
      This paper presents a prediction technique for partition sequences. It uses a region-by-region approach that consists of four steps: region parameterization, region prediction, region ordering, and partition creation. The ...
    • Rapidly rotating cylinder flow with an oscillating sidewall 

      López Moscat, Juan Manuel; Marqués Truyol, Francisco (2014-02-17)
      Article
      Accés obert
      We present numerical simulations of a flow in a rapidly rotating cylinder subjected to a time-periodic forcing via axial oscillations of the sidewall. When the axial oscillation frequency is less than twice the rotation ...
    • Rapidly rotating precessing cylinder flows: forced triadic resonances 

      Lopez Moscat, Juan Manuel; Marqués Truyol, Francisco (2018-03-25)
      Article
      Accés restringit per política de l'editorial
      Rapidly rotating cylinder flows subjected to low-amplitude precessional forcing are studied numerically over a range of cylinder and precessional rotation rates. For sufficiently small rotation rates, viscous effects lead ...
    • Shear instabilities in Taylor-Couette flow 

      Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando; Marqués Truyol, Francisco; Àvila Cañellas, Marc (Springer, 2009-09-09)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Subcritical instabilities in small gap Taylor-Couette (TCF) problem are studied numerically when both cylinders rotate in opposite directions. The computations are carried out for a radius ratio A first exploration is ...
    • Small aspect ratio Taylor-Couette flow: onset of a very-low-frequency three-torus state 

      López Moscat, Juan Manuel; Marqués Truyol, Francisco (2003-09-03)
      Article
      Accés obert
      The nonlinear dynamics of Taylor-Couette flow in a small aspect ratio annulus (where the length of the cylinders is half of the annular gap between them) is investigated by numerically solving the full three-dimensional ...
    • Spiral vortices between concentric cylinders 

      Sánchez Umbría, Juan; Crespo Artiaga, Daniel; Marqués Truyol, Francisco (1993-06-01)
      Article
      Accés restringit per política de l'editorial
      Spiral vortices appearing in Couette- Taylor flows are studied by means of numerical simulation. Transition curves from Couctte to spiral vortices for different radius ratios and wavenumbers have been calculated in order ...
    • Spontaneous generation of a swirling plume in a stratified ambient 

      Marqués Truyol, Francisco; López Moscat, Juan Manuel (2014-12-01)
      Article
      Accés restringit per política de l'editorial
      The transition from laminar to complex spatio-temporal dynamics of plumes due to a localized buoyancy source is studied numerically. Several experiments have reported that this transition is sensitive to external perturbations. ...
    • Stably stratified Taylor-Couette flows 

      López Alonso, José Manuel; Lopez, Juan M; Marqués Truyol, Francisco (2023-05-01)
      Article
      Accés obert
      Stably stratified Taylor–Couette flow has attracted much attention due to its relevance as a canonical example of the interplay among rotation, stable stratification, shear and container boundaries, as well as its potential ...
    • Stratified Taylor-Couette flow: nonlinear dynamics 

      López Soler, Juan M.; Marqués Truyol, Francisco (2022-01-10)
      Article
      Accés obert
      A series of experiments on stratified Taylor–Couette flow in short aspect ratio wide-gap annuli found an intriguing and not-well-understood dynamics: nonlinear coherent structures appearing and disappearing periodically, ...
    • Symmetry-breaking Hopf bifurcations to 1-, 2-, and 3-tori in small-aspect-ratio counter- rotating Taylor-Couette flow 

      Altmeyer, Sebastian Andreas; López, J.M; Marqués Truyol, Francisco; Do, Younghae (2013)
      Comunicació de congrés
      Accés obert
    • Symmetry-breaking Hopf bifurcations to 1-, 2-, and 3-tori in small-aspect-ratio counter-rotating Taylor-Couette flow 

      Altmeyer, Sebastian Andreas; López, J.M; Marqués Truyol, Francisco; Do, Younghae (2013)
      Text en actes de congrés
      Accés obert
    • Three-dimensional instabilities in a discretely heated annular flow: onset of spatio-temporal complexity via defect dynamics 

      Marqués Truyol, Francisco; Lopez, Juan M (2014-06-10)
      Article
      Accés obert
      The transition to three-dimensional and unsteady flow in an annulus with a discrete heat source on the inner cylinder is studied numerically. For large applied heat flux through the heater (large Grashof number Gr), there ...
    • Transitions to three-dimensional flows in a cylinder driven by oscillations of the sidewall 

      Panadès Guinart, Carles; Marqués Truyol, Francisco; Lopez, Juan M. (2011-08)
      Article
      Accés obert
      The transition from two-dimensional to three-dimensional flows in a finite circular cylinder driven by an axially oscillating sidewall is explored in detail. The complete symmetry group of this flow, including a ...