Stabilization of the wake behind a circular cylinder that performs high-frequency angular oscillations

Guvernyuk, S.V.; Dynnikova, G.Y.; Dynnikov, Y.A.; Malakhova, T.V.

Авторы: Guvernyuk S.V., Dynnikova G.Ya, Dynnikov Ya A., Malakhova T.V.
Журнал: Doklady Physics
Том: 55
Номер: 5
Год издания: 2010
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 228
Последняя страница: 232
DOI: 10.1134/S102833581005006X
Аннотация: The effect of stabilization of the wake behind a circular cylinder in a laminar flow of viscous incompressible fluid at a high frequency of angular oscillations of the cylinder, which was observed in experiments by Taneda, is reproduced numerically. Mechanisms of holding the stabilized flow mode are considered. A new gridless numerical method of viscous vortex domains (VVD) is used. Therefore, the experimentally found effect of stabilization of the wake after the rapidly oscillating cylinder [1] is explained by the effect of mechanisms of diffusion and annihilation of the vortexes in thin concentric layers of the alternating sign near wall vorticity. To reproduce these mechanisms in the computational experiment, it is necessary to provide high resolution of the vorticity field in the near wall region and stability of the computational circuit with respect to abrupt gradients of the strength of this field. A new numerical method of viscous vortex domains [11–14] applied by us satisfied the listed requirements, and using it, we succeeded in reproducing the effect of stabilization of the wake behind the circular cylinder performing high frequency rotational oscillations.
Добавил в систему: Гувернюк Сергей Владимирович

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