Investigation on bathtub vortex flow field by Particle Image Velocimetry

Cristofano, Luca; Nobili, Matteo; Romano, G. P.; Caruso, Gianfranco

doi:10.1016/j.expthermflusci.2015.12.005

Cited by 27 publications

(14 citation statements)

References 25 publications

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“…The water level H in the tank was fixed at 50 mm in all the experimental tests, to compare the present results with those reported in [24].…”

Section: Experimental Facilitymentioning

confidence: 62%

“…For this purpose, for Stage 1 and Stage 2 conditions flow rate values are equal to those selected in [24]; for Stage 4, instead, a lower flow rate had to be chosen to obtain a stable vortex.…”

Section: Experimental Facilitymentioning

confidence: 99%

“…(Table 1), corresponding to three of the four different development stages of vortex (classified as in [24]) have been performed. Unfortunately, it was not possible to identify a flow rate to reproduce a Stage 3 vortex in steady conditions.…”

Section: Experimental Facilitymentioning

confidence: 99%

“…In [24], Cristofano et al performed PIV measurements in order to characterize the structure of free vortices. Measurements were carried out at different horizontal planes and for different vortex stages, to analyze the flow field variations with the vortex strength and along the axial coordinate.…”

Section: Introductionmentioning

confidence: 99%

“…Measurements have been carried out in horizontal planes at different heights and for different Reynolds numbers (calculated with reference to the drain hole diameter and the mean exit velocity); varying the Reynolds number, vortices with different strength are obtained (different vortex stages). For a proper comparison between the present and the past free vortex measurements, the water level in the tank and the measurement plane heights were the same adopted in [24], as also the flow rates in the two vortex stage conditions. Tangential average velocity fields have been evaluated in steady-state conditions (time averaged) and compared with the potential solution (Rankine's vortex model).…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation on Free Surface Vortices Driven by Tangential Inlets

Caruso¹,

Cristofano²,

Nobili³

et al. 2016

IJHT

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Particle Image Velocimetry (PIV) measurements have been carried out in order to analyze the structure of free surface vortices in a promoting geometry with two tangential inlets. Velocity fields associated to the free surface vortex have been obtained at different horizontal planes and Reynolds numbers. Average velocity fields have been calculated and tangential velocity profiles have been compared at different vortex stages and measurement planes. The results show that tangential flow is uniform along the vortex axis and it scales well with the average exit velocity. The tangential velocity profiles, in comparison to the potential behavior, show discrepancies especially at large distances from the vortex axis. Vorticity fields and circulation profiles have been also derived from the measured velocity fields and discussed. The circulation profiles increase along the vortex radius even at large distances from the vortex axis, so that the potential solution is not applicable at all. The comparison of tangential velocity and circulation profiles between promoted and free vortices, the last presented in a previous paper, shows that the tangential motion in a driven vortex is more intense and predominant over the sink effect (radial motion), except very close to the tank bottom, as in a forced configuration (i.e. rotating cylindrical tank).

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“…The water level H in the tank was fixed at 50 mm in all the experimental tests, to compare the present results with those reported in [24].…”

Section: Experimental Facilitymentioning

confidence: 62%

Section: Experimental Facilitymentioning

confidence: 99%

Section: Experimental Facilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental Investigation on Free Surface Vortices Driven by Tangential Inlets

Caruso¹,

Cristofano²,

Nobili³

et al. 2016

IJHT

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Physical and Mathematical Simulation of Surface‐Free Vortex Formation and Vortex Prevention Design during the End of Casting in Tundish

Ruan

Yao

Shen

et al. 2020

steel research int.

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Herein, the formation of the vortex and slag entrainment in tundish is studied by using mathematical and physical simulation. This article aims at contributing to the understanding of the free surface vortex formation in continuous casting tundish at the end of casting. A 3D multiphase mathematical model using the renormalization group (RNG) k–ε turbulence model is developed to predict the vortex formation and slag layer behavior on the scale of the 1:4 water model of a two‐strand slab tundish. The Eulerian volume of fluid model is adopted to track the steel–slag–air free surface and vortex, and the effect of Coriolis force is considered in this simulation. An improved vortex prevention design is also proposed by changing the position of the diversion hole on the dam of the tundish, which is compared with the original scheme using numerical and physical simulation. The predicted results of the vortex structure and the critical height of the vortex formation agree well with the water modeling results. It is demonstrated that the critical height of the vortex formation is reduced significantly by regulating the position of the diversion hole on the dam near the outlet of the tundish.

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