Instability of a Nonuniform Compressible Gas with Self-Gravity | Sciact - CRIS-система Института катализа

Instability of a Nonuniform Compressible Gas with Self-Gravity Научная публикация

Конференция

Plasmas in the Laboratory and in the Universe: Interactions, Patterns and Turbulence : International Symposium
01-04 дек. 2009 , Comо

Сборник

Plasmas in the Laboratory and the Universe: Interactions, Patterns, and Turbulence
Сборник, 2010. ISBN 978-0-7354-0787-9.

Журнал

AIP Conference Proceedings
ISSN: 0094-243X , E-ISSN: 1551-7616

Вых. Данные

Год: 2010, Том: 1242, Страницы: 355-362 Страниц : 8 DOI: 10.1063/1.3460149

Ключевые слова

gravitational gas dynamics, isothermal gas clouds, stability

Авторы

Snytnikov Valeriy N. ^1,2 , Stadnichenko Olga A. ^1,2

Организации

1	Boreskov Institute of Catalysis SB RAS, Novosibirsk, Lavrent’eva av., 5, Russia
2	Novosibirsk State University, Novosibirsk, Pirogova str., 2, Russia

Информация о финансировании (3)

1	Президиум РАН	26
2	Президиум РАН
3	Президиум РАН

For the case of nonuniform gas with viscosity and gravity, a dispersion relation was obtained for the perturbations whose wave vector is directed along the density gradient. The gravitational‐convective perturbations were shown to be locally instable in a non‐viscous isothermal gas over the entire spectrum of wave vectors. This leads to instability of the gas stationary distributions. Solving the initial‐boundary value problems of non‐stationary dynamics of isothermal gas requires regularization by, e.g., viscosity. Viscosity does not hinder the growth of the Jeans part of gravitational‐convective instability. Numerical experiments based on a completely three‐dimensional transient code demonstrated the development of collapse in isothermal cloud.

Snytnikov V.N. , Stadnichenko O.A.
Instability of a Nonuniform Compressible Gas with Self-Gravity
В сборнике Plasmas in the Laboratory and the Universe: Interactions, Patterns, and Turbulence. 2010. – C.355-362. – ISBN 978-0-7354-0787-9. DOI: 10.1063/1.3460149 WOS Scopus РИНЦ OpenAlex

Web of science:	WOS:000284019000040
Scopus:	2-s2.0-77955824479
РИНЦ:	15336875
OpenAlex:	W2014468848

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