Transport processes and sound velocity in vibrationally non-equilibrium gas of anharmonic oscillators

Результат исследований: Научные публикации в периодических изданияхстатья в журнале по материалам конференции

Выдержка

Vibrationally non-equilibrium flows of chemically homogeneous diatomic gases are considered under the conditions that the distribution of the molecules over vibrational levels differs significantly from the Boltzmann distribution. In such flows, molecular collisions can be divided into two groups: the first group corresponds to "rapid" microscopic processes whereas the second one corresponds to "slow" microscopic processes (their rate is comparable to or larger than that of gasdynamic parameters variation). The collisions of the first group form quasi-stationary vibrationally non-equilibrium distribution functions. The model kinetic equations are used to study the transport processes under these conditions. In these equations, the BGK-type approximation is used to model only the collision operators of the first group. It allows us to simplify derivation of the transport fluxes and calculation of the kinetic coefficients. Special attention is given to the connection between the formulae for the bulk viscosity coefficient and the sound velocity square.

Язык оригиналаанглийский
ЖурналAIP Conference Proceedings
Том1959
DOI
СостояниеОпубликовано - 2 мая 2018
СобытиеВосьмые Поляховские чтения: международная научная конференция по механике - Старый Петергоф, Saint Petersburg, Российская Федерация
Продолжительность: 29 янв 20182 фев 2018
Номер конференции: 8
https://events.spbu.ru/events/polyakhov_readings
http://nanomat.spbu.ru/en/node/175
http://nanomat.spbu.ru/ru/node/192
http://spbu.ru/news-events/calendar/viii-polyahovskie-chteniya

Отпечаток

acoustic velocity
oscillators
gases
nonequilibrium flow
diatomic gases
molecular collisions
collisions
Boltzmann distribution
coefficients
kinetic equations
derivation
distribution functions
viscosity
operators
kinetics
approximation
molecules

Предметные области Scopus

  • Физика и астрономия (все)

Цитировать

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Transport processes and sound velocity in vibrationally non-equilibrium gas of anharmonic oscillators. / Rydalevskaya, Maria A.; Voroshilova, Yulia N.

В: AIP Conference Proceedings, Том 1959, 02.05.2018.

Результат исследований: Научные публикации в периодических изданияхстатья в журнале по материалам конференции

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