Exploració per tema "Convection (Astrophysics)"
Ara es mostren els items 1-13 de 13
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123-321 models of classical novae
(EDP Sciences, 2020-01-28)
Article
Accés obert
Realitzat a/amb: Università di PisaContext. 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
(2014-01-10)
Article
Accés restringit per política de l'editorialThe 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
(2008-11-03)
Article
Accés obertThe 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
(2014-01-23)
Article
Accés obertThermal 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
(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, ... -
Convectons, anticonvectons and multiconvectons in binary fluid convection
(2011-01-25)
Article
Accés obertBinary 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
(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 ... -
Exponential versus IMEX high-order time integrators for thermal convection in rotating spherical shells
(2014-01-24)
Article
Accés obertWe 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
(2014-08-01)
Article
Accés obertWe 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
(American Chemical Society (ACS), 2018-02-26)
Article
Accés obertThis 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
(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 ... -
Transitions between symmetric and nonsymmetric regimes in binary-mixture convection
(Elsevier, 2015-05-15)
Article
Accés obertWe 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
(2013-05)
Article
Accés obertBinary 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 ...