Аннотация
The structure of confined vortex flow generated by a rotating lid in a closed container with polygonal cross-section geometry (eight, six and five angles) has been investigated numerically for different height/radius aspect ratios h from 3.0 to 4.5 and for Reynold numbers ranging from 1500 to 3000. The critical Reynolds numbers at which the flow becomes unsteady were determined numerically by STAR-CCM+ computational fluid dynamics software for pentagonal and hexagonal cross-section configurations. The obtained results were compared with the flow structure in the closed cylindrical container. The boundary of a nonstationarity in polygonal containers is found to shift to the region of smaller aspect ratio and smaller Reynolds numbers with a decrease in the number of angles in the cross-section of the container relative to the boundary in a cylindrical container. It is additionally established that the structure of the flow in the near-axis region remains similar to the vortex structure in the cylinder, therefore the shape of the container does not influence the near-axis region.
Язык оригинала | английский |
---|---|
Номер статьи | 012002 |
Число страниц | 6 |
Журнал | Journal of Physics: Conference Series |
Том | 980 |
Номер выпуска | 1 |
DOI | |
Состояние | Опубликовано - 19 мар 2018 |
Событие | 6th International Conference on Heat and Mass Transfer and Hydrodynamics in Swirling Flows - Novosibirsk, Российская Федерация Продолжительность: 21 ноя 2017 → 23 ноя 2017 |