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Journal Articles Journal of Applied Fluid Mechanics Year : 2016

Characterization of Swirling Flows in a Partly Open Cylinder


A partly open vertical disk-cylinder system, with an annular top lid, is used to model numerically the characteristics of axisymmetric swirling flows with stagnation and associated flows reversal; commonly referred to as vortex breakdown. The flows are driven by the bottom disk uniform rotation and controlled by the competition between the no-slip and stress-free surface conditions applied at the top. Depending on the radial extent of the free surface, distinct regions of toroidal, corner and on-axis vortex type flows were identified and mapped into a state diagram then discussed. In addition, the impact of the cavity aspect ratio on the onset conditions of stagnation and breakdown was highlighted. Moreover, the study explored the influence of a diffusion driven meridian circulation, induced by the sidewall differential rotation, which is revealed to constitute an effective non intrusive kinematic means of flow control.
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Dates and versions

hal-01404170 , version 1 (28-11-2016)




  • HAL Id : hal-01404170 , version 1


M. Imoula, R Saci, B Benkoussas, R Gatignol. Characterization of Swirling Flows in a Partly Open Cylinder. Journal of Applied Fluid Mechanics, 2016, 9 (6), pp.3167 - 3176. ⟨hal-01404170⟩
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