Near field brine discharge modeling part 2: Validation of commercial tools

Palomar, P.; Lara, Javier L.; Losada, Íñigo J.

doi:10.1016/j.desal.2011.10.021

Cited by 60 publications

(30 citation statements)

References 10 publications

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“…The experimental results from Kikkert et al [8] and Oliver et al [30] as well as the integral modelling predictions from Palomar et al [15] are also included for comparison. From the figure, the normalized LES predictions with different Fr were similar to each other with slight divergences towards the downstream direction.…”

Section: Jet Trajectory and Overall Flow Characteristicsmentioning

confidence: 98%

“…They compared their numerical results with those obtained from previous integral models and experimental observations, and concluded that the k-e predictions provided a more accurate representation of the mixing processes compared to the integral models. More recently, Palomar et al [15] reported an overview of the performances of some widely-used integral models, including CORMIX, VISUAL PLUMES and VISJET, on the analysis of inclined dense jets. Their study revealed significant discrepancies in the dilution predictions by these integral models for brine discharge modeling.…”

Section: Introductionmentioning

confidence: 99%

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Large eddy simulations of 45° inclined dense jets

et al. 2015

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Submerged inclined dense jets (negatively buoyant jets) occur in many engineering applications such as brine discharges from seawater desalination plants and decooling water discharges from liquefied natural gas plants, and their mixing behavior needs to be examined in details for the environmental impact analysis. In the present study, a detailed numerical investigation was performed using the large eddy simulation (LES) approach with both the Smagorinsky and Dynamic Smagorinsky sub-grid scale (SGS) models to simulate the characteristics of the inclined dense jet with 45°inclination. The numerical predictions included the jet trajectory, geometrical characteristics, jet spread and eddy structures. Experimental measurements were also obtained for the validation of the LES predictions, and data from existing studies in the literature were included for comparison. Overall, the LES predictions were able to reproduce the geometric characteristics of the inclined dense jet in a satisfactory manner in most aspects. The dilution was however generally underestimated, which was attributed primarily to the inability of the SGS models to reproduce the convective mixing induced by the buoyancy-induced instability using the adopted grid spacing in the bottom half of the inclined dense jet.

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Section: Jet Trajectory and Overall Flow Characteristicsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Large eddy simulations of 45° inclined dense jets

et al. 2015

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“…Modification of CorJet equationsCorJet predictions underestimate the experimentally obtained data for both trajectory and dilutions[17]. The model results can compare better to the observed data if CorJet equations…”

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confidence: 43%

“…Although IM can be also used for NBJ, their predictions concerning the jet rise height and dilutions are rather conservative, as it has been reported by Papanicolaou et al [21] and Palomar et al [17]. Papanicolaou et al [21] tried to cope with this lack of agreement between the predicted and experimental data by decreasing the jet entrainment coefficient (α j ) of their model by 30-47 %; this decrease gave better predictions of the NBJ geometrical characteristics.…”

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confidence: 83%

A modified integral model for negatively buoyant jets in a stationary ambient

2014

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A simple modification is introduced into the integral model (IM) CorJet in an effort to predict better the characteristics of negatively buoyant jets (NBJ) discharged in a stationary ambient. Although this modification was developed for the CorJet model, it can be applied to every IM which employs the entrainment hypothesis. The detrainment of fluid from the main flow is taken into account by inserting a coefficient "p" into the conservation equations of volume, buoyancy and tracer mass flux. This coefficient expresses the ratio of the specific mass flux of the detrained fluid to the net specific mass flux entrained to the NBJ. The value of p is assumed constant along the jet trajectory and up to the maximum jet height, becoming zero thereafter. Results show that the modified CorJet model (MCM) predicts reasonably well experimental data from the literature and data from experiments performed in this work. The optimal value of p and therefore the detrained fluid from the main NBJ flow was found to decrease as the jet initial densimetric Froude number increases.

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“…El estudio del proceso de mezcla con el medio receptor de estos vertidos hiperdensos (salmuera) es complejo y constituye un gran reto científico en la ingeniería hidráulica actual, dada la multitud de variables que intervienen en él [4][5][6].…”

Section: Introductionunclassified