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The universal law for the velocity profile in turbulent boundary layerстатья
- Автор: Zubarev V.M.
- Сборник: Материалы XXI Международной конференции по вычислительной механике и современным прикладным программным системам (ВМСППС'2019), 24-31 мая 2019 Алушта
- Серия: ISBN 978-5-4316-0589-5
- Год издания: 2019
- Место издания: Изд-во МАИ
- Первая страница: 373
- Последняя страница: 375
- Аннотация: The numerous experiments show that the flow in the boundary layer near the wall can be divided into three domains: the viscous sublayer (dimensionless distance from the wall $0 \le y^+ < 5$), the area where the average dimensionless velocity $u^+$ shows the linear relation with $y^+$, completely turbulent sublayer ($30 \le y^+ < 200$), where relation between $u^+$ and $y^+$ are approximately defined by the logarithmic function, and the buffer zone between those above mentioned sublayers ($5 \le y^+ < 30$). While modeling the turbulence in the near-wall region the known universal variables $y^+$ and $u^+$ are used, which are called the wall law variables. The new analytic functional dependencies $u^+(y^+)$ are found in the study, which are just in the area from the wall up to a wake zone ($0 \le y^+ < 2000$) for zero-pressure gradient flow on a plane plate and also for the flow in a diffuser with a strongly positive (increasingly adverse) pressure gradient (APG). The comparison of the turbulent boundary layer numerical modeling results using near-wall $k$-$\varepsilon$ model and the predicted curves, obtained by analytic formulas, with the experimental data has been executed.
- Добавил в систему: Зубарев Вячеслав Михайлович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | cmmass2019_web.pdf | 17,0 МБ | 25 сентября 2019 [Zubarev_V.M.] |