Ara es mostren els items 1-13 de 13

    • 123-321 models of classical novae 

      José Pont, Jordi; Shore, Steven N.; Casanova Bustamante, Jordi (EDP Sciences, 2020-01-28)
      Article
      Accés obert
      Realitzat a/amb:   Università di Pisa
      Context. High-resolution spectroscopy has revealed large concentrations of CNO and sometimes other intermediate-mass elements (e.g., Ne, Na, Mg, or Al, for ONe novae) in the shells ejected during nova outbursts, suggesting ...
    • A comparison of high-order time integrators for highly supercritical thermal convection in rotating spherical shells 

      Garcia Gonzalez, Ferran; Net Marcé, Marta; Sánchez Umbría, Juan (2014-01-10)
      Article
      Accés restringit per política de l'editorial
      The efficiency of implicit and semi-implicit time integration codes based on backward differentiation and extrapolation formulas for the solution of the three-dimensional Boussinesq thermal convection equations in rotating ...
    • Antisymmetric polar modes of thermal convection in rotating spherical fluid shells at high Taylor numbers 

      García González, Fernando; Net Marcé, Marta; Sánchez Umbría, Juan (2008-11-03)
      Article
      Accés obert
      The onset of thermal convection in a rotating spherical shell of intermediate radius ratio ¼ 0:4 is studied numerically for Taylor numbers Ta 1011 and the Prandtl number of the liquid sodium ( ¼ 0:01). For the first ...
    • 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 (2014-01-23)
      Article
      Accés obert
      Thermal convection in a rotating cylinder with a radius-to-height 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 ...
    • 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 obert
      Modulated 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, ...
    • Convectons, anticonvectons and multiconvectons in binary fluid convection 

      Mercader Calvo, María Isabel; Batiste Boleda, Oriol; Alonso Maleta, María Aránzazu; Knobloch, Edgar (2011-01-25)
      Article
      Accés obert
      Binary fluid mixtures with a negative separation ratio heated from below exhibit steady spatially localized states called convectons for supercritical Rayleigh numbers. Numerical continuation is used to compute such states ...
    • 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 obert
      A 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 ...
    • Exponential versus IMEX high-order time integrators for thermal convection in rotating spherical shells 

      Garcia Gonzalez, Ferran; Bonaventura, Luca; Net Marcé, Marta; Sánchez Umbría, Juan (2014-01-24)
      Article
      Accés obert
      We assess the accuracy and efficiency of several exponential time integration methods coupled to a spectral discretization of the three-dimensional Boussinesq thermal convection equations in rotating spherical shells. ...
    • Pattern selection near the onset of convection in binary mixtures in cylindrical cells 

      Alonso Maleta, Arantxa; Mercader Calvo, María Isabel; Batiste Boleda, Oriol (2014-08-01)
      Article
      Accés obert
      We report numerical investigations of three-dimensional pattern formation of binary mixtures in a vertical cylindrical container heated from below. Negative separation ratio mixtures, for which the onset of convection ...
    • Time-dependent patterns in quasivertical cylindrical binary convection 

      Alonso Maleta, María Aránzazu; Mercader Calvo, María Isabel; Batiste Boleda, Oriol (American Chemical Society (ACS), 2018-02-26)
      Article
      Accés obert
      This paper reports on numerical investigations of the effect of a slight inclination a on pattern formation in a shallow vertical cylindrical cell heated from below for binary mixtures with a positive value of the Soret ...
    • Torsional solutions of convection in rotating fluid spheres 

      Sánchez Umbría, Juan; Net Marcé, Marta (2019-01-25)
      Article
      Accés obert
      A 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 ...
    • Transitions between symmetric and nonsymmetric regimes in binary-mixture convection 

      Meca Álvarez, Esteban; Mercader Calvo, María Isabel; Ramírez de la Piscina Millán, Laureano (Elsevier, 2015-05-15)
      Article
      Accés obert
      We present here a comprehensive picture of the different bifurcations found for small to moderate Rayleigh number in binary-mixture convection with lateral heating and negative separation ratio (S). The present work connects ...
    • Travelling convectons in binary fluid convection 

      Mercader Calvo, María Isabel; Batiste Boleda, Oriol; Alonso Maleta, María Aránzazu; Knobloch, Edgar (2013-05)
      Article
      Accés obert
      Binary fluid mixtures with a negative separation ratio heated from below exhibit steady spatially localized states called convectons for supercritical Rayleigh numbers. With no-slip, fixed-temperature, no-mass-flux boundary ...