The features of developing a counterflow zone (bubble-mode vortex breakdown or vortex explosion) at the center of an intensively swirled flow produced in a liquid-filled cylindrical container with a rotating endwall have been studied. The observation showed that the scenario of developing a bubble-mode breakdown zone with generation of counterflow is the same for cylinders with low or high aspect ratio, and it remains independent of stationary-nonstationary transition boundary for the main vortex flow.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
M.P. Escudier, Observations of the flow produced in a cylindrical container by a rotating endwall, Exp. Fluids, 1984, Vol. 2, P. 189–196.
J.N. Sorensen, I.V. Naumov, and V.L. Okulov, Multiple helical modes of vortex breakdown, J. Fluid Mech., 2011, Vol. 683, P. 430–441.
I.V. Naumov, V.L. Okulov, and J.N. Sorensen, Diagnostics of spatial structure of vortex multiplets in a swirl flow, Thermophysics and Aeromechanics, 2010, Vol. 17, No. 4, P. 551–558.
D.V. Kulikov, R. Mikkelsen, I.V. Naumov, and V.L. Okulov, Diagnostics of bubble-mode vortex breakdown in swirling flow in a large-aspect-ratio cylinder, Technical Physics Letters, 2014, Vol. 40, No. 2, P. 181–184.
E. Serre and P. Bontoux, Vortex breakdown in a three-dimensional swirling flow, J. Fluid Mech., 2002, Vol. 459, P. 347–370.
J.N. Sorensen, I.V. Naumov, and R. Mikkelsen, Experimental investigation of three-dimensional flow instabilities in a rotating lid-driven cavity, Exp. Fluids, 2006, Vol. 41, No. 3, P. 425–440.
V.L. Okulov, I.V. Naumov, and J.N. Sorensen, Optical diagnostics of intermittent flows, Techn. Phys., 2007, Vol. 77, No. 5, P. 583–595.
Research was financially supported by the Russian Science Foundation (Project No. 14-29-00093).
About this article
Cite this article
Naumov, I.V., Mikkelsen, R.F. & Okulov, V.L. Stagnation zone formation on the axis of a closed vortex flow. Thermophys. Aeromech. 21, 767–770 (2014). https://doi.org/10.1134/S0869864314060134
- confined vortex flow
- nonstationary vortex breakdown
- digital tracer visualization