Результаты исследований: Научные публикации в периодических изданиях › статья в журнале по материалам конференции › Рецензирование
A comparison is made between the continuum and kinetic approaches in studying the shock wave structure in argon, nitrogen, and carbon dioxide. Using the kinetic-theory methods, one-temperature and two-temperature fluid-dynamic equations are derived and closed. Calorically non-perfect gas model is applied, with vibrational energy explicitly calculated. The algorithm for the calculation of transport coefficients including bulk viscosity is implemented. For argon and nitrogen, a good agreement of the solutions obtained using both the continuum approach and direct statistical simulations (DSMC) with experimental results is shown. For carbon dioxide, the one-temperature Navier-Stokes equations do not reproduce non-monotonic temperature behaviour. The two-temperature model yields the results qualitatively similar to those given by DSMC; quantitative discrepancies are however significant. The DSMC relaxation rate strongly depends on the vibrational collision numbers in various CO2 modes.
Язык оригинала | английский |
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Номер статьи | 012032 |
Число страниц | 8 |
Журнал | Journal of Physics: Conference Series |
Том | 1959 |
Номер выпуска | 1 |
DOI | |
Состояние | Опубликовано - 14 июл 2021 |
Событие | Международная научная конференция по механике «IX Поляховские чтения» - СПбГУ, Санкт-Петербург, Российская Федерация Продолжительность: 9 мар 2021 → 12 мар 2021 Номер конференции: IX https://events.spbu.ru/events/polyakhov-2021 |
ID: 78935966