ISENTROPIC "SHOCK WAVES" IN NUMERICAL ASTROPHYSICS
Journal Title: Odessa Astronomical Publications - Year 2016, Vol 29, Issue
Abstract
Numerical simulations of the cold supersonic flows in different astrophysical problems meets with the loss of precision difficulty. For to overcome the difficulty it was suggested earlier to use conservation entropy equation instead of energy conservation law. In the paper we analyse quantitatively the error what appears in the shocked flow when isoentropic equations are used. The isentropic equations of gas dynamics can be used only when there are no shocks in the solution or when they are weak and do not significantly affect the flow. The results described here were represented as a talk at the 16-th Gamow Summer School: ”Astronomy and beyond: Astrophysics, Cosmology, Cosmomicrophysics, Astroparticle Physics, Radioastronomy and Astrobiology” 14-20 August, 2016,Odessa,Ukraine. The complete paper is published in Bisnovatyi-Kogan & Moiseenko, 2016.
Authors and Affiliations
S. G. Moiseenko, G. S. Bisnovatyi-Kogan
Keywords
Related Articles
- EP ID EP374630
- DOI 10.18524/1810-4215.2016.29.84972
- Views 91
- Downloads 0
COMPARISON OF ZERO ZONE CATALOGUES OF THE FON PROGRAM BASED ON THE KYIV AND KITAB OBSERVATIONS
The two new catalogues for the zero zone of the FON project were created after the processing of two different collections of digitized photographic plates. The photographic plates were received at the DAZ and DWA telesc...
X-RAY SPECTRAL PROPERTIES OF THE ISOLATED AGNs: NGC 1050, NGC 2989, ESO 317-038, ESO 438-009
We have analyzed the spectral data obtained by XMM-Newton, Swift, Chandra, and INTEGRAL space observatories for several isolated AGNs from 2MIG catalogue, for which the available X-ray data were accessed. Among these obj...
THE RESULTS OF OBSERVATIONS OF MUTUAL PHENOMENA OF THE GALILEAN SATELLITES OF JUPITER IN 2009 AND 2015 IN NIKOLAEV ASTRONOMICAL OBSERVATORY
The Earth and Jupiter once in 6 years have simultaneous passage of the ecliptic plane due to their orbital movement around the Sun. This makes it possible to observe the mutual occultations and eclipses in the Galilean s...
ASPECTS OF STRING PHENOMENOLOGY IN PARTICLE PHYSICS AND COSMOLOGY
We discuss possible connections between several scales in particle physics and cosmology, such the the electroweak, inflation, dark energy and Planck scales. We then describe the phenomenology of a model of supersymmetry...
OBTAINING POSITIONS OF ASTEROIDS FROM DIGITIZED PROCESSING OF PHOTOGRAPHIC OBSERVATIONS IN BALDONE OBSERVATORY (CODE 069)
Digital processing of photographic plates of star fields allows to determine with high accuracy the coordinates and stellar magnitudes for all registered objects on these plates. The processing results can be used for a...