Abstract
Experiments were performed with a particle tracking velocimetry system to investigate the behaviour of inclined negatively buoyant jets with source angles of 15°, 30°, 45°, 60°, 65°, 70°, and 75° in stationary ambient conditions. Velocities were measured in a plane aligned with the central axis of the flow and the experiments were designed such that the flow did not interact with boundaries in the region were the flow behaviour was measured. The results of this study complement previous research, which has largely focused on the mean geometric characteristics and the mean dilution of the discharged fluid. Geometric characteristics, spreading rates, and time-averaged (mean) centreline velocity results are compared with relevant experimental results from previous studies and integral model predictions. Axial and transverse mean velocity profiles at maximum height and the return point provide additional insights into the detrainment of discharged fluid due to the unstable density gradient on the inner side of the flow.
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References
Lattemann S, Kennedy MD, Schippers JC, Amy G (2010) Chapter 2 Global Desalination Situation. Sustain Sci Eng
Bleninger T, Jirka GH (2008) Modelling and environmentally sound management of brine discharges from desalination plants. Desalination 221:585–597
Voutchkov N (2011) Overview of seawater concentrate disposal alternatives. Desalination 273:205–219
Einav R, Lokiecb F, Lokiec F (2003) Environmental aspects of a desalination plant in Ashkelon. Desalination 156:79–85
Cooley H, Gleick PH, Wolff G (2006) Desalination, with a grain of salt: a California perspective. Stud. Dev. Environ. Secur, Oakland, CA Pacific Inst
Dolnicar S, Schäfer AI (2009) Desalinated versus recycled water: public perceptions and profiles of the accepters. J Environ Manag 90:888–900
Hodgkiess T, Oldfield J, Höpner T (2003) Assessment of the composition of desalination plant disposal brines. Middle East Desalin. Res, Cent
WHO (2007) Desalination for safe water supply: Guidance for the health and environmental aspects applicable to desalination
Bleninger T, Jirka GH, Report P (2009) Environmental planning, prediction and management of brine discharges from desalination plants
Doneker RL, Jirka GH (2001) CORMIX-GI systems for mixing zone analysis of brine wastewater disposal. Desalination 139:263–274
Palomar P, Lara J, Losada I et al (2012) Near field brine discharge modelling part 1: analysis of commercial tools. Desalination 290:28–42
Roberts PJW, Ferrier A, Daviero G (1997) Mixing in inclined dense jets. J Hydraul Eng 123:693–699
Zeitoun MA (1970) Conceptual Designs of Outfall Systems for Desalting Plants
Roberts PJW, Toms G (1987) Inclined dense jets in flowing current. J Hydraul Eng 113:323–341
Lane-Serff GF, Linden PF, Hillel M (1993) Forced, angled plumes. J Hazard Mater 33:75–99
Lindberg WR (1994) Experiments on negatively buoyant jets, with and without cross-flow. NATO ASI Ser E Appl Sci Study Inst 255:131–146
Bloomfield LJ, Kerr RC (2002) Inclined turbulent fountains. J Fluid Mech 451:283–294
Cipollina A, Brucato A, Grisafi F, Nicosia S (2005) Bench-scale investigation of inclined dense jets. J Hydraul Eng 131:1017–1022
Nemlioglu S, Roberts PJ (2006) Experiments on dense jets using three-dimensional laser-induced fluorescence (3D LIF). Int. Conf. Mar. Waster Water Discharges Coast, Environ
Kikkert GA, Davidson MJ, Nokes RI (2007) Inclined negatively buoyant discharges. J Hydraul Eng 133:545–554
Ferrari S, Querzoli G (2010) Mixing and re-entrainment in a negatively buoyant jet. J Hydraul Res 48:632–640
Shao D, Law AWKW (2010) Mixing and boundary interactions of 30° and 45° inclined dense jets. Environ Fluid Mech 10:521–553
Papakonstantis IG, Christodoulou GC, Papanicolaou PN (2011) Inclined negatively buoyant jets 1: geometrical characteristics. J Hydraul Res 49:3–12
Papakonstantis IG, Christodoulou GC, Papanicolaou PN (2011) Inclined negatively buoyant jets 2: concentration measurements. J Hydraul Res 49:13–22
Lai CCKK, Lee JHWW (2012) Mixing of inclined dense jets in stationary ambient. J Hydro Environ Res 6:9–28
Oliver C, Davidson M, Nokes R (2013) Removing the boundary influence on negatively buoyant jets. Environ Fluid Mech 13:625–648
Cheung SKB, Leung DYL, Wang W, et al. (2000) VISJET - a computer ocean outfall modelling system. Proc. Comput. Graph. Int. Conf. CGI. IEEE Comput. Soc, pp 75–80
Palomar P, Lara JL, Losada IJ (2012) Near field brine discharge modeling part 2: validation of commercial tools. Desalination 290:28–42
Oliver C, Davidson M, Nokes R (2013) Predicting the near-field mixing of desalination discharges in a stationary environment. Desalination 309:148–155
Loya-Fernández Á, Ferrero-Vicente LM, Marco-Méndez C et al (2012) Comparing four mixing zone models with brine discharge measurements from a reverse osmosis desalination plant in Spain. Desalination 286:217–224
Nokes R (2012) Streams Version 2.00 - System Theory and Design. University of Canterbury. Technical manual. Available: http://www.civil.canterbury.ac.nz/streams.shtml
Blackett SA (1994) Particle Tracking Velocimetry. University of Auckland. Masters thesis
Crowe AT (2013) Inclined negatively buoyant jets and boundary interaction. University of Canterbury. Doctoral thesis
Wang H, Law A (2002) Second-order integral model for a round turbulent buoyant jet. J Fluid Mech 459:397–428
Papanicolaou PN, List EJ (1988) Investigations of round vertical turbulent buoyant jets. J Fluid Mech 195:341–391
Panchapakesan NR, Lumley JL, Panchapakesan NR (1993) Turbulence measurements in axisymmetric jets of air and helium. Part 1. Air Jet J Fluid Mech 246:197–223
Hussein HJ, Capp SP, George WK (1994) Velocity measurements in a high-Reynolds-number, momentum-conserving, axisymmetric, turbulent jet. J Fluid Mech 258:31–75
Fischer HB, List JE, Koh RC, et al. (1979) Mixing in Inland and Coastal Waters. Academic Press, Inc
Shabbir A, George WK (1992) Experiments on a round turbulent buoyant plume. J Fluid Mech 275:1–32
Kikkert GA (2006) Buoyant jets with two and three-dimensional trajectories. University of Canterbury. Doctoral thesis
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Crowe, A.T., Davidson, M.J. & Nokes, R.I. Velocity measurements in inclined negatively buoyant jets. Environ Fluid Mech 16, 503–520 (2016). https://doi.org/10.1007/s10652-015-9435-y
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DOI: https://doi.org/10.1007/s10652-015-9435-y