Exploració per autor "Net Marcé, Marta"
Ara es mostren els items 19-36 de 36
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Mathematical modeling of different molecule removal on on-line haemodiafiltration. Influence of dialysis duration and infusion flow
Maduell, Francesc; Sánchez Umbría, Juan; Net Marcé, Marta; Gómez, Miquel; González, Josep Maria; Arias, Marta; Rodriguez, Nestor; Rico, N.; Campistol, Josep (2015-02-01)
Article
Accés restringit per política de l'editorialBackground: In a previous study on a nocturnal, every-other-day online haemodiafiltration scheme, different removal patterns were observed for urea, creatinine, ß2-¿microglobulin, myoglobin and prolactin. The aim of this ... -
Numerical continuation methods for large-scale dissipative dynamical systems
Sánchez Umbría, Juan; Net Marcé, Marta (2016-11-22)
Article
Accés obertA tutorial on continuation and bifurcation methods for the analysis of truncated dissipative partial differential equations is presented. It focuses on the computation of equilibria, periodic orbits, their loci of ... -
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 multiple shooting continuation of periodic orbits by Newton-Krylov methods
Sánchez Umbría, Juan; Net Marcé, Marta (2010)
Article
Accés restringit per política de l'editorialThe application of the multiple shooting method to the continuation of periodic orbits in large-scale dissipative systems is analyzed. A preconditioner for the linear systems which appear in the application of Newton’s ... -
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 ... -
Periodic orbits in tall laterally heated rectangular cavities
Net Marcé, Marta; Sánchez Umbría, Juan (2017-02-02)
Article
Accés obertThis study elucidates the origin of the multiplicity of stable oscillatory flows detected by time integration in tall rectangular cavities heated from the side. By using continuation techniques for periodic orbits, it is ... -
Prandtl number dependence of convective fluids in tall laterally heated slots
Sánchez Umbría, Juan; Net Marcé, Marta (Springer, 2018-10-04)
Article
Accés obertThe influence of the Prandtl number on the stable stationary and periodic flows of the fluids contained in laterally heated slots under realistic conditions is analyzed by using continuation methods. Namely, non-slip ... -
Radial collocation methods for the onset of convection in rotating spheres
Sánchez Umbría, Juan; García González, Fernando; Net Marcé, Marta (2016-03-01)
Article
Accés obertThe viability of using collocation methods in radius and spherical harmonics in the angular variables to calculate convective flows in full spherical geometry is examined. As a test problem the stability of the conductive ... -
Stability analysis for the onset of convection in rotating fluid binary mixtures in spherical shells
Net Marcé, Marta; García González, Fernando; Sánchez Umbría, Juan (2011)
Text en actes de congrés
Accés obertThe stability analysis of the basic conductive state of a rotating binary mixture of two fluids bounded by spherical shells is studied. The Boussinesq approximation of the mass conservation, Navier-Stokes, energy and ... -
Stationary flows and periodic dynamics of binary mixtures in tall laterally heated slots
Sánchez Umbría, Juan; Net Marcé, Marta (Springer, 2018-07-05)
Capítol de llibre
Accés restringit per política de l'editorialThe steady and oscillatory dynamics of binary fluids contained in slots heated by the side is studied by using continuation methods, and stability analysis. The bifurcation points on the branches of solutions are determined ... -
Thermal convection in autogravitating spheres at low Ekman numbers
Net Marcé, Marta; García González, Fernando; Sánchez Umbría, Juan (2015)
Comunicació de congrés
Accés obert -
Thermal convection in rotating spherical geometry: a numerical overview of the transitions from periodic axisymmetric to temporally complex three-dimensional flows
Sánchez Umbría, Juan; Net Marcé, Marta (American Institute of Physics (AIP), 2022-12-16)
Article
Accés obertThe aim of this work is to elucidate the type of transitions that take place when the periodic axisymmetric flows, which can set up at the onset of thermal convection in rotating fluid spheres, lose stability and to study ... -
Three-dimensional quasiperiodic torsional flows in rotating spherical fluids at very low Prandtl numbers
Sánchez Umbría, Juan; Net Marcé, Marta (2021-11-04)
Article
Accés obertThe aim of this study is to determine through numerical simulations the extent and robustness of the three-dimensional torsional dynamics of the thermal convection in rotating spherical fluids at very low Prandtl numbers. ... -
Torsional solutions of convection in rotating fluid spheres
Sánchez Umbría, Juan; Net Marcé, Marta (2019-01-25)
Article
Accés obertA numerical study of the nonlinear torsional solutions of convection in rotating, internally heated, self-gravitating fluid spheres is presented. Their dependence on the Rayleigh number has been found for two pairs of Ekman ... -
Two computational approaches for the simulation of fluid problems in rotating spherical shells
García González, Fernando; Dormy, Emmanuel; Sánchez Umbría, Juan; Net Marcé, Marta (2014)
Article
Accés obertMany geophysical and astrophysical phenomena such as magnetic fields generation, or the differential rotation observed in the atmospheres of the major planets are studied by means of numerical simulations of the Navier-Stokes ... -
Two computational approaches for the simulation of fluid problems in rotating spherical shells
García González, Fernando; Dormy, Emmanuel; Sánchez Umbría, Juan; Net Marcé, Marta (2014)
Comunicació de congrés
Accés obertMany geophysical and astrophysical phenomena such as magnetic fields generation, or the differential rotation observed in the atmospheres of the major planets are studied by means of numerical simulations of the Navier-Stokes ...