Exploració per autor "García González, Fernando"
Ara es mostren els items 6-25 de 35
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Chaotic wave dynamics in weakly magnetized spherical Couette flows
García González, Fernando; Seilmayer, Martin; Giesecke, André; Stefani, Frank (Institute of Physics (IOP), 2020-04-14)
Article
Accés obertDirect numerical simulations of a liquid metal filling the gap between two concentric spheres are presented. The flow is governed by the interplay between the rotation of the inner sphere (measured by the Reynolds number ... -
Computation of azimuthal waves and their stability in thermal convection in rotating spherical shells with application to the study of a double-Hopf bifurcation
Sánchez Umbría, Juan; García González, Fernando; Net Marcé, Marta (2013-03-22)
Article
Accés obertA methodology to compute azimuthal waves, appearing in thermal convection of a pure fluid contained in a rotating spherical shell, and to study their stability is presented. It is based on continuation, Newton-Krylov, and ... -
Continuation and stability of convective modulated rotating waves in spherical shells
García González, Fernando; Net Marcé, Marta; Sánchez Umbría, Juan (2016-01-01)
Article
Accés obertModulated rotating waves (MRW), bifurcated from the thermal-Rossby waves that arise at the onset of convection of a fluid contained in a rotating spherical shell, and their stability, are studied. For this purpose, ... -
Continuation and stability of rotating waves in the magnetized spherical Couette system: secondary transitions and multistability
García González, Fernando; Stefani, Frank (2018-12)
Article
Accés obertRotating waves (RW) bifurcating from the axisymmetric basic magnetized spherical Couette (MSC) flow are computed by means of Newton–Krylov continuation techniques for periodic orbits. In addition, their stability is analysed ... -
Critical torsional modes of convection in rotating fluid spheres at high Taylor numbers
Sánchez Umbría, Juan; García González, Fernando; Net Marcé, Marta (2016-02-15)
Article
Accés obertA numerical study of the onset of convection in rotating internally heated self-gravitating fluid spheres is presented. The exploration of the stability of the conduction state versus the Taylor and Prandtl numbers supplies ... -
Deep model simulation of polar vortices in gas giant atmospheres
García González, Fernando; Chambers, Frank; Watts, Anna (Oxford University Press, 2020-11-04)
Article
Accés obertThe Cassini and Juno probes have revealed large coherent cyclonic vortices in the polar regions of Saturn and Jupiter, a dramatic contrast from the east–west banded jet structure seen at lower latitudes. Debate has centred ... -
Dynamic transitions of the magnetized spherical Couette flow between its base state and the return flow instability
Ogbonna, Jude; García González, Fernando; Gundrum, Thomas; Seilmayer, Martin; Stefani, Frank (Institute of Physics (IOP), 2022-01-01)
Article
Accés obertThe transition between the stable base state of the magnetized spherical Couette (MSC) flow and the return flow instability is experimentally investigated. The experiments are conducted using an MSC setup consisting of ... -
Estudio comparativo de la eficiencia de diversos integradores para la simulación numérica de la convección térmica en geometría esférica y rotación
García González, Fernando; Net Marcé, Marta; Garcia-Archilla, Bosco; Sánchez Umbría, Juan (2010)
Text en actes de congrés
Accés obertThe efficiency of implicit and semi-implicit time integration codes based on bac- kward differentiation and extrapolation formulae for the solution of the three-dimensio- nal Boussinesq thermal convection equations in ... -
Experimental investigation of the return flow instability in magnetized spherical Couette flows
Ogbonna, Jude; García González, Fernando; Gundrum, Thomas; Seilmayer, Martin; Stefani, Frank (2020-12-01)
Article
Accés obertWe conduct magnetized spherical Couette (MSC) flow experiments in the return flow instability regime with GaInSn as the working fluid, the ratio of the inner to the outer sphere radii ri/ro = 0.5, the Reynolds number Re = ... -
Four-frequency solution in a magnetohydrodynamic Couette flow as a consequence of azimuthal symmetry breaking
García González, Fernando; Seilmayer, Martin; Giesecke, André; Stefani, Frank (American Institute of Physics (AIP), 2020-12-31)
Article
Accés obertThe occurrence of magnetohydrodynamic quasiperiodic flows with four fundamental frequencies in differentially rotating spherical geometry is understood in terms of a sequence of bifurcations breaking the azimuthal symmetry ... -
High dimensional tori and chaotic and intermittent transients in magnetohydrodynamic Couette flows
García González, Fernando; Ogbonna, Jude; Giesecke, André; Stefani, Frank (2023-04)
Article
Accés obertThe magnetised spherical Couette (MSC) problem, a three dimensional magnetohydrodynamic paradigmatic model in geo- and astrophysics, is considered to investigate bifurcations to high-dimensional invariant tori and chaotic ... -
Intermittent chaotic flows in the weakly magnetised spherical Couette system
García González, Fernando; Seilmayer, Martin; Giesecke, André; Stefani, Frank (2021-12)
Article
Accés obertExperiments on the magnetised spherical Couette system are presently being carried out at Helmholtz-Zentrum Dresden-Rossendorf (HZDR). A liquid metal (GaInSn) is confined within two differentially rotating spheres and ... -
Long term time dependent frequency analysis of chaotic waves in the weakly magnetized spherical Couette system
García González, Fernando; Seilmayer, Martin; Giesecke, André; Stefani, Frank (2021-04)
Article
Accés obertThe long therm behavior of chaotic flows is investigated by means of time dependent frequency analysis. The system under test consists of an electrically conducting fluid, confined between two differentially rotating ... -
Magnetically induced gluing bifurcations of three-tori in spherical Couette flows
García González, Fernando (American Institute of Physics (AIP), 2023-11-27)
Article
Accés obertThe global dynamics of three-tori associated with homoclinic/heteroclinic global (infinite period) bifurcations are investigated for the magnetized spherical Couette problem, a paradigmatic model in geo- and astrophysical ... -
Modulated rotating waves and triadic resonances in spherical fluid systems: The case of magnetized spherical Couette flow
García González, Fernando; Giesecke, André; Stefani, Frank (2021-04)
Article
Accés obertThe existence of triadic resonances in the magnetized spherical Couette system is related to the development of modulated rotating waves, which are quasiperiodic flows understood in terms of bifurcation theory in systems ... -
Modulated rotating waves in the magnetised spherical Couette system
García González, Fernando; Seilmayer, Martin; Giesecke, André; Stefani, Frank (2019-12)
Article
Accés obertWe present a study devoted to a detailed description of modulated rotating waves (MRW) in the magnetised spherical Couette system. The set-up consists of a liquid metal confined between two differentially rotating spheres ... -
Numerical simulations of thermal convection in rotating spherical shells under laboratory conditions
García González, Fernando; Sánchez Umbría, Juan; Net Marcé, Marta (2014-03-05)
Article
Accés restringit per política de l'editorialAn exhaustive study, based on numerical three-dimensional simulations, of the Boussinesq thermal convection of a fluid confined in a rotating spherical shell is presented. A moderately low Prandtl number fluid (ro = 0.1) ... -
Numerical study of the onset of thermosolutal convection in rotating spherical shells
Net Marcé, Marta; García González, Fernando; Sánchez Umbría, Juan (2012-06-01)
Article
Accés obertThe influence of an externally enforced compositional gradient on the onset of convection of a mixture of two components in a rotating fluid spherical shell is studied for Ekman numbers E = 10−3 and E = 10−6, Prandtl numbers ... -
On the onset of low Prandtl number convection in rotating spherical shells: non-slip boundary conditions
Net Marcé, Marta; García González, Fernando; Sánchez Umbría, Juan (2008-01-15)
Article
Accés obertAccurate numerical computations of the onset of thermal convection in wide rotating spherical shells are presented. Low-Prandtl-number (σ) fluids, and non-slip boundary conditions are considered. It is shown that at small ... -
Oscillatory convection in rotating spherical shells: low Prandtl number and non-slip boundary conditions
García González, Fernando; Sánchez Umbría, Juan; Dormy, Emmanuel; Net Marcé, Marta (2015-10-01)
Article
Accés obertA five-degree model, which reproduces faithfully the sequence of bifurcations and the type of solutions found through numerical simulations of the three-dimensional Boussinesq thermal convection equations in rotating ...