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Characteristics of axisymmetric viscous incompressible flow passinga torus rotating about its centerline |
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| รหัสดีโอไอ | |
| Creator | Pairin Suwannasri |
| Title | Characteristics of axisymmetric viscous incompressible flow passinga torus rotating about its centerline |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2559 |
| Journal Title | Songklanakarin Journal of Science and Technology (SJST) |
| Journal Vol. | 38 |
| Journal No. | 3 |
| Page no. | 319-324 |
| Keyword | axisymmetric flow,toroidal coordinate system,rotating torus |
| ISSN | 0125-3407 |
| Abstract | The present numerically investigates the axisymmetric flow past a rotating torus in a viscous incompressible fluid.The surface of the torus rotates with constant velocity around its centerline. A numerical model has been developed for thegoverning equation in the toroidal coordinate system. The rotating boundary of a torus generates inertia in the surroundingfluid. There are two interesting regimes. In one of them, a rotation of torus surface generates a toroidal fluid region whichenvelopes the torus. In another one a rotation of torus surface generates the jet of fluid expelled from the hole downward.We focus on the hydrodynamics of a torus effected by a rotational rate (?) and the aspect ratios (Ar). The numerical simulationsare performed for three aspect ratios, Ar = 2, 3 and 5, where Ar is defined as ratio of torus radius (b) to cross-sectionradius of torus (a) and the range of rotational rate ? ? ? 4.0 2.0, ? where ? is defined as ratio of tangential tank-treadingmotion of torus surface to the uniform far-field velocity. |
