Browsing by Author "Marqués Truyol, Francisco"

An exactly solvable model in P.R.M.: quantization. II
Iranzo Fernández, Vicente; Llosa, J; Marqués Truyol, Francisco; Molina, A (198401)
Article
Open AccessThe quantization of a priori hamiltonian predictive systems is studied. It is applied to quantize the family of Nparticle relativistic models presented in ref. 1. The relativistic twoparticle oscillator is studied in ... 
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 (20130408)
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 ... 
Conductive and convective heat transfer in fluid flows between differentially heated and rotating cylinders
López, José M.; Marqués Truyol, Francisco; Àvila Cañellas, Marc (20151101)
Article
Open AccessThe flow of fluid confined between a heated rotating cylinder and a cooled stationary cylinder is a canonical experiment for the study of heat transfer in engineering. The theoretical treatment of this system is greatly ... 
Confined rotating convection with large Prandtl number: centrifugal effects on wall modes
Curbelo Hernández, Jezabel; López Moscat, Juan Manuel; Mancho Sánchez, Ana María; Marqués Truyol, Francisco (20140123)
Article
Open AccessThermal convection in a rotating cylinder with a radiustoheight aspect ratio of G=4 for fluids with large Prandtl number is studied numerically. Centrifugal buoyancy effects are investigated in a regime where the Coriolis ... 
Crossflow instability of finite Bödewadt flows: transients and spiral waves
López, Juan A.; Marqués Truyol, Francisco; Rubio, Antonio M.; Àvila Cañellas, Marc (200911)
Article
Open AccessThe flow in an enclosed rotating cylinder with a stationary lower end wall is investigated numerically. For fast rotation rates, the flow in the interior is primarily in the azimuthal direction, with an angular momentum ... 
Dynamics of axially localized states in TaylorCouette flows
López Alonso, José Manuel; Marqués Truyol, Francisco (20150515)
Article
Open AccessWe present numerical simulations of the flow confined in a wide gap TaylorCouette system, with a rotating inner cylinder and variable lengthtogap aspect ratio. A complex experimental bifurcation scenario differing from ... 
Extensional channel flow revisited: a dynamical systems perspective
Marqués Truyol, Francisco; Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando; Weidman, Patrick (20170607)
Article
Open AccessExtensional selfsimilar 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 ... 
Foldpitchfork bifurcation for maps with Z(2) symmetry in pipe flow
Marqués Truyol, Francisco; Mellibovsky Elstein, Fernando; Meseguer Serrano, Álvaro (20130711)
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 ... 
Inertial waves in rapidly rotating flows: a dynamical systems perspective
López Moscat, Juan Manuel; Marqués Truyol, Francisco (20161102)
Article
Open AccessAn overview of recent developments in a wide variety of enclosed rapidly rotating flows is presented. Highlighted is the interplay between inertial waves, which have been predicted from linear inviscid considerations, and ... 
Instabilities and inertial waves generated in a librating cylinder
López, J.M.; Marqués Truyol, Francisco (20111125)
Article
Restricted access  publisher's policyA librating cylinder consists of a rotating cylinder whose rate of rotation is modulated. When the mean rotation rate is large compared with the viscous damping rate, the flow may support inertial waves, depending on the ... 
Instability mechanisms and transition scenarios of spiral turbulence in TaylorCouette flow
Meseguer Serrano, Álvaro; Mellibovsky Elstein, Fernando; Àvila Cañellas, Marc; Marqués Truyol, Francisco (200910)
Article
Open AccessAlternating laminar and turbulent helical bands appearing in shear flows between counterrotating cylinders are accurately computed and the nearwall instability phenomena responsible for their generation identified for the ... 
Instability of plumes driven by localized heating
López Moscat, Juan Manuel; Marqués Truyol, Francisco (201312)
Article
Open AccessPlumes due to localized buoyancy sources are of wide interest owing to their prevalence in many situations. This study investigates the transition from laminar to turbulent dynamics. Several experiments have reported that ... 
Mode competition in cylindrical flows driven by sidewall oscillations
Panadès Guinart, Carles; Marqués Truyol, Francisco; Meseguer Serrano, Álvaro (201304)
Article
Open AccessThe transition from a twodimensional to threedimensional 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 ... 
Nonlinear and detuning effects of the nutation angle in precessionallyforced rotating cylinder flow
Lopez Moscat, Juan Manuel; Marqués Truyol, Francisco (20160616)
Article
Open AccessThe 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 (20100901)
Article
Open AccessThe 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 ... 
Pinning of rotating waves to defects in finite TaylorCouette flow
Pacheco, J. R.; López, J. M.; Marqués Truyol, Francisco (20110110)
Article
Open AccessExperiments in small aspectratio Taylor–Couette flows have reported the presence of a band in parameter space where rotating waves become steady nonaxisymmetric solutions (a pinning effect) via infiniteperiod bifurcations. ... 
Precession of a rapidly rotating cylinder flow: traverse through resonance
Marqués Truyol, Francisco; López Moscat, Juan Manuel (20151006)
Article
Restricted access  publisher's policyRecent 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 segmentationbased coding schemes
Marqués Truyol, Francisco; Gasull Llampallas, Antoni (199804)
Article
Open AccessThis paper presents a prediction technique for partition sequences. It uses a regionbyregion 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 (20140217)
Article
Open AccessWe present numerical simulations of a flow in a rapidly rotating cylinder subjected to a timeperiodic 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 (20180325)
Article
Restricted access  publisher's policyRapidly rotating cylinder flows subjected to lowamplitude precessional forcing are studied numerically over a range of cylinder and precessional rotation rates. For sufficiently small rotation rates, viscous effects lead ...