Interaction of a turbulent round jet with the free surface

Madnia, C. K.; Bernal, Luis P.

doi:10.1017/s0022112094000352

Cited by 61 publications

(20 citation statements)

References 24 publications

(34 reference statements)

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“…That behavior does not have a significant impact on the flow patterns inside the slurry region in a deep tank [19]. The fluid properties of water were evaluated at room temperature (20 o C).…”

Section: Computational Model Validationmentioning

confidence: 99%

Analysis of Turbulent Mixing Jets in a Large Scale Tank

Lee

Dimenna

Leishear

et al. 2008

Journal of Fluids Engineering

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Flow evolution models were developed to evaluate the performance of the new advanced design mixer pump for sludge mixing and removal operations with high-velocity liquid jets in one of the large-scale Savannah River Site waste tanks, Tank 18. This paper describes the computational model, the flow measurements used to provide validation data in the region far from the jet nozzle, the extension of the computational results to real tank conditions through the use of existing sludge suspension data, and finally, the sludge removal results from actual Tank 18 operations.A computational fluid dynamics approach was used to simulate the sludge removal operations. The models employed a three-dimensional representation of the tank with a two-equation turbulence model. Both the computational approach and the models were validated with onsite test data reported here and literature data. The model was then extended to actual conditions in Tank 18 through a velocity criterion to predict the ability of the new pump design to suspend settled sludge. A qualitative comparison with sludge removal operations in Tank 18 showed a reasonably good comparison with final results subject to significant uncertainties in actual sludge properties.

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Section: Computational Model Validationmentioning

confidence: 99%

Analysis of Turbulent Mixing Jets in a Large Scale Tank

Lee

Dimenna

Leishear

et al. 2008

Journal of Fluids Engineering

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“…This information will assist in the sludge suspension and removal plans for Tank 11 operations. The steady-state flow patterns on the horizontal discharge plane follow a series of parabolic curves similar to that of a free jet [10,11]. Vertical velocity profiles are changed from a bell-shaped curve near the exit of the nozzle to a near-uniform velocity near the tank wall boundary.…”

Section: Resultsmentioning

confidence: 99%

“…3 [6,10,11]. Most mixing action and entrainment takes place in the region of fully-developed flow which begins at a distance of approximately eight nozzle diameters from the discharge plane.…”

Section: Characterization Of the Jet Flow Generated By A Slurry Pump mentioning

confidence: 99%

Sludge Heel Removal Analysis for Slurry Pumps of Tank 11

Lee¹

2003

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“….). In the literature, few works appear on flow visualizations [6,7]. This paper also attempts to fill a part of this lack.…”

Section: Introductionmentioning

confidence: 99%

“…Following these experimental processes, results were dedicated to the description of the mean and turbulent velocity fields as well as the void fraction, bubble size and frequency [13]. Except the contributions of Walker et al [6] or Madnia and Bernal [7], the literature related to flow visualization aiming to estimate characteristic length scales of the free surface and comparison with measurements is sparse although this kind of information could be helpful for scientists, biologists or coastal engineers. This paper also presents flow visualizations and free surface length scale measurements made in the context of a horizontal jet closed to an air/water interface.…”

Section: Introductionmentioning

confidence: 99%