Treffer: Diffusion in stellar interiors: Critical tests of three numerical methods
Title:
Diffusion in stellar interiors: Critical tests of three numerical methods
Authors:
Source:
Astronomy and astrophysics (Berlin. Print). 416(3):1023-1036
Publisher Information:
Les Ulis: EDP Sciences, 2004.
Publication Year:
2004
Physical Description:
print, 16 ref
Original Material:
INIST-CNRS
Subject Terms:
Astronomy earth cosmic environment, Astronomie et environnement cosmique terrestre, Sciences exactes et technologie, Exact sciences and technology, Terre, ocean, espace, Earth, ocean, space, Astronomie, Astronomy, Astronomie fondamentale et astrophysique. Instrumentation, techniques, et observations astronomiques, Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations, Techniques d'observation et de réduction des données. Simulation et modélisation par ordinateur, Observation and data reduction techniques. Computer modeling and simulation, Méthodes mathématiques et méthodes de simulation sur ordinateur, Mathematical procedures and computer techniques, Coefficient diffusion, Diffusion coefficient, Coeficiente difusión, Diffusion(transport), Diffusion, Equation diffusion, Diffusion equation, Ecuación difusión, Equation transport, Transport equation, Ecuación transporte, Moment cinétique, Angular momentum, Méthode différence finie, Finite difference method, Méthode numérique, Numerical method, Método numérico, Simulation numérique, Digital simulation, Structure interne stellaire, Stellar interiors, diffusion, methods: numerical, stars: interiors
Document Type:
Fachzeitschrift
Article
File Description:
text
Language:
English
Author Affiliations:
Geneva Observatory, 1290 Sauverny, Switzerland
Integral Science Data Center, Ch. d'Ecogia, 1290 Versoix, Switzerland
Integral Science Data Center, Ch. d'Ecogia, 1290 Versoix, Switzerland
ISSN:
0004-6361
Rights:
Copyright 2004 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Astronomy
Accession Number:
edscal.15543207
Database:
PASCAL Archive
Weitere Informationen
We describe and discuss the properties of three numerical methods for solving the diffusion equation for the transport of the chemical species and of the angular momentum in stellar interiors. We study through numerical experiments both their accuracy and their ability to provide physical solutions. On the basis of new tests and analyses applied to the stellar astrophysical context, we show that the most robust method to follow the secular evolution is the implicit finite differences method. The importance of correctly estimating the diffusion coefficient between mesh points is emphasized and a procedure for estimating the average diffusion coefficient between a convective and a radiative zone is described.