Bench-Scale Investigation of Inclined Dense Jets

Cipollina, Andrea; Brucato, Alberto; Grisafi, F.; Nicosia, Salvatore

doi:10.1061/(asce)0733-9429(2005)131:11(1017)

Cited by 99 publications

(69 citation statements)

References 8 publications

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“…For an initial jet angle (θ) of 60° these three studies obtained k-values of 2.04, 2.08, and 2.2, respectively. Cipollina et al [15] obtained k-values for different geometric quantities and initial jet angles. No significant effects of viscosity on the k-value were observed, which was also found in [9] see Table 2.…”

Section: Previous Results For Geometric Jet Quantitiesmentioning

confidence: 99%

“…Similar flow problems were previously analyzed through dimensional analysis e.g. [1,7,12,15,24]. Most previous studies assumed that the Boussinesq approximation is valid and that the flow is fully turbulent.…”

Section: Dimensional Analysis Of Negatively Buoyant Jetsmentioning

confidence: 89%

“…Cipollina et al [15] extended the work performed in previous studies on negatively buoyant jets discharged into calm ambient by investigating flows at different discharge angles, namely 30°, 45°, and 60°, and for three densities 1055, 1095 and 1179 kg/m 3 . Kikkert et al [16] developed an analytical solution to predict the behavior of inclined negatively buoyant jets, and reasonable agreement was obtained with measurements for initial discharge angles ranging from 0° to 75° and initial densimetric Froude numbers from 14 to 99.…”

Section: Background and Previous Studiesmentioning

confidence: 94%

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An Experimental Investigation on Inclined Negatively Buoyant Jets

Bashitialshaaer

Larson

Persson

2012

Water

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An experimental study was performed to investigate the behavior of inclined negatively buoyant jets. Such jets arise when brine is discharged from desalination plants. A turbulent jet with a specific salinity was discharged through a circular nozzle at an angle to the horizontal into a tank with fresh water and the spatial evolution of the jet was recorded. Four different initial jet parameters were changed, namely the nozzle diameter, the initial jet inclination, the jet density and the flow rate. Five geometric quantities describing the jet trajectory that are useful in the design of brine discharge systems were determined. Dimensional analysis demonstrated that the geometric jet quantities studied, if normalized with the jet exit diameter, could be related to the densimetric Froude number. Analysis of the collected data showed that this was the case for a Froude number less than 100, whereas for larger values of the Froude number the scatter in the data increased significantly. As has been observed in some previous investigations, the slope of the best-fit straight line through the data points was a function of the initial jet angle (θ), where the slope increased with θ for the maximum levels (Y m ) studied, but had a more complex behavior for horizontal distances.

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Section: Previous Results For Geometric Jet Quantitiesmentioning

confidence: 99%

Section: Dimensional Analysis Of Negatively Buoyant Jetsmentioning

confidence: 89%

Section: Background and Previous Studiesmentioning

confidence: 94%

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An Experimental Investigation on Inclined Negatively Buoyant Jets

Bashitialshaaer

Larson

Persson

2012

Water

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“…Roberts et al, 1997, developed new experiments using optical Laser Fluorescence induced (LIF) techniques for a more rigorous study of a 60º hyperdense jet, discharged on a stagnant environment. Cipollina et al, 2005, developed a numerical model for hyperdense jets discharged into a stagnant environment, based on the integration of differential equations. Jirka, 2004, proposed a more complex eulerian three dimensional integration model for stagnant and dynamic environments.…”

Section: Research Related To Brine Discharge Behaviour and Modelling:mentioning

confidence: 99%

Impacts of Brine Discharge on the Marine Environment. Modelling as a Predictive Tool

Palomar¹,

Losada²

2011

Desalination, Trends and Technologies

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“…Bloomfield and Kerr (2002) [21] focused on the maximum edge heights for jets with inclination between 30° and 90°. Cipollina et al (2005) [2] studied angles of 30°, 45° and 60° with different Froude number, focusing on the maximum height, distance from the source and dilution of the impact point. Kikkert et al (2007 [22], 2010 [23]) studied different horizontal and vertical inclination of the release, and of the ambient receptor, measuring dilution and trajectories.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies for the characterization of the mixing processes in negative buoyant jets

Besalduch

Badas

Ferrari

et al. 2013

EPJ Web of Conferences

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Abstract.A negatively buoyant jet (NBJ) corresponds to the physical phenomenon that develops when a fluid is discharged upwards into a lighter environment or downwards into a heavier receptor fluid. In a NBJ the flow is initially driven mostly by the momentum, so it basically behaves as a simple jet released with the same angle, while far from the outlet the buoyancy prevails, bending the jet axis down and making it similar to a plume. The coexistence in the same phenomenon of both the characteristics of simple jets and plumes makes the NBJs a phenomenon still not entirely explained but, considering also the numerous practical applications, very interesting to study. Here some of the experimental results are presented. The laboratory experiment were obtained on a model simulating a typical sea discharge of brine from desalination plants: a pipe laid down on the sea bottom, with orifices on its lateral wall, releasing brine (heavier than the sea water) with a certain angle to the horizontal, in order to increase the jet path before sinking to the seafloor. A non-intrusive image analysis technique, namely Feature Tracking Velocimetry, is applied to measure velocity fields, with the aim at understanding the influence of some non-dimensional parameters driving the phenomenon (e.g. Reynolds number, release angle) on the structure of the NBJ and of the turbulence.

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Bench-Scale Investigation of Inclined Dense Jets

Cited by 99 publications

References 8 publications

An Experimental Investigation on Inclined Negatively Buoyant Jets

An Experimental Investigation on Inclined Negatively Buoyant Jets

Impacts of Brine Discharge on the Marine Environment. Modelling as a Predictive Tool

Experimental Studies for the characterization of the mixing processes in negative buoyant jets

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