RAS MathematicsЖурнал вычислительной математики и математической физики Computational Mathematics and Mathematical Physics

  • ISSN (Print) 0044-4669
  • ISSN (Online) 3034-533

On Preserving Spherical Symmetry on a Spherical Grid in the Cartesian Coordinate System When Calculating Gas-Dynamic Currents by Euler Finite-Volume Schemes

PII
S3034533S0044466925080063-1
DOI
10.7868/S303453325080063
Publication type
Article
Status
Published
Authors
Volume/ Edition
Volume 65 / Issue number 8
Pages
1387-1396
Abstract
The sufficient conditions for finite-volume Euler schemes for calculating gas-dynamic currents in the Cartesian coordinate system using the Gaussian method for the divergence and gradient operators and the midpoint method for approximating integrals over cell faces to preserve spherical symmetry on a spherical grid are determined. Two approaches to ensuring the geometric condition on the ratio of the areas of the corner faces to the volume of the cell are proposed, viz. correction of areas and special selection of partitioning with respect to the polar angle. As an example of preserving the symmetry when the sufficient conditions are met, the calculation of the spherical problem of discontinuity breakdown by the Euler scheme of the Godunov type is considered.
Keywords
газовая динамика конечно-объемные эйлеровы схемы сохранение сферической симметрии декартова система координат сферическая сетка
Date of publication
22.05.2025
Year of publication
2025
Number of purchasers
0
Views
16

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