The structure of the confined swirling flow under different phase boundary conditions at the fixed end of the cylinder

Abstract

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Experimental study of a closed vortex flow of a liquid under various boundary conditions

“…Then, along the interface, the liquid will flow in a converging spiral to the axis of the cylinder and down along the axis of the cylinder to the rotating disk. Thus, as in the case of swirling from above, in this system, the simultaneous meridional and circulatory motion of the liquid will form [11,12].…”

“…An additional factor that reduces the light flow is a swirling device above the surface of the culture medium. It was shown in [11,12] that in a vertical cylindrical container the structure of a closed vortex flow is the same regardless of whether the flow is swirled by the upper or lower rotating disk. Therefore, in order for the light flow to be maximum above the liquid surface, it is probably possible to use a device with a swirl from below and a free interface from above, without a significant change in the topology of the vortex flow.…”

Vortex breakdown in the small Mach number regimes

“…The effect of other flow complexities like variable lid-rotation rates [12], two-fluid system [7,[13][14][15][16][17], thermal stratification [18][19][20][21], roughness in the rotating plate [22,23], axial magnetic field [24,25] etc has been of interest to the community due to its engineering application. Various studies have been performed to control the vortex breakdown bubble [26,27].…”