scholarly journals Modelling the cleaning of viscoplastic layers by impinging coherent turbulent water jets

2020 ◽  
Vol 282 ◽  
pp. 104314
Author(s):  
R.R. Fernandes ◽  
D.I. Wilson
Keyword(s):  
Water Jets ◽  
Turbulent Water

Scour by jets in cohesionless and cohesive soils

2007 ◽  
Vol 34 (6) ◽  
pp. 744-751 ◽  
Author(s):  
Kerry A Mazurek ◽  
Tanvir Hossain
Keyword(s):  
Impinging Jets ◽  
Coarse Grained ◽  
Cohesive Soils ◽  
Wall Jets ◽  
Fine Grained ◽  
Water Jets ◽  
Turbulent Wall Jets ◽  
Turbulent Wall ◽  
Turbulent Water ◽  
Unified Method

A technique is developed in this paper to unify the methods of analyzing scour by turbulent water jets in cohesionless and cohesive soils. Data from previous studies using circular turbulent impinging jets and circular turbulent wall jets are used to compare the scour in low void ratio cohesive soils to that in uniform sands and gravels. Scour by these jets is related to the dimensionless excess stress on the soil bed. It is seen that this parameter will likely work well for developing a method to predict scour for circular wall jets that is applicable to both materials. However, a circular impinging jet appears to vary appreciably in its interaction with the bed between the two types of soil, which makes developing a unified method to predict scour by impinging jets more difficult. Key words: erosion, scour, water jets, cohesionless sediments, cohesive sediments, fine-grained soils, coarse-grained soils.

scholarly journals High-speed IR thermography of submerged turbulent water jets

2016 ◽  
Author(s):  
I. Znamenskaya ◽  
E. Koroteeva ◽  
A. Novinskaya ◽  
N. Sysoev
Keyword(s):  
High Speed ◽  
Ir Thermography ◽  
Water Jets ◽  
Turbulent Water

Flash Evaporation From Turbulent Water Jets

1984 ◽  
Vol 106 (2) ◽  
pp. 407-416 ◽  
Author(s):  
D. Bharathan ◽  
T. Penney
Keyword(s):  
Experimental Data ◽  
Experimental Investigation ◽  
Initial Level ◽  
Evaporation Process ◽  
Approximate Analysis ◽  
Liquid Temperature ◽  
Flash Evaporation ◽  
Water Jets ◽  
Physical Phenomena ◽  
Turbulent Water

Results of an experimental investigation of flash evaporation from turbulent planar and axisymmetric water jets are reported. In the range of jet thicknesses tested, for planar jets, due to shattering, evaporation is found to be nearly independent of the jet thickness. Evaporation from the planar jets was found to be dependent on the initial level of turbulence in the water supply manifold. An approximate analysis to model the evaporation process based on the physical phenomena and experimental observations is outlined. Comparisons between the experimental data and analytical predictions of the liquid temperature variation along the jet are included. Use of screens in the water jet are shown to be effective for enhancing evaporation.

scholarly journals Structure of particle-laden turbulent water jets in still water

1987 ◽  
Vol 13 (5) ◽  
pp. 699-716 ◽  
Author(s):  
R.N. Parthasarathy ◽  
G.M. Faeth
Keyword(s):  
Water Jets ◽  
Turbulent Water

EXPERIMENTAL STUDIES OF TURBULENT WATER JETS

1988 ◽  
pp. 643-648 ◽  
Author(s):  
Yu Changzhao ◽  
Xiao Zuoting ◽  
Zhou Bingliang ◽  
Chen Daoyi
Keyword(s):  
Experimental Studies ◽  
Water Jets ◽  
Turbulent Water

Hydrodynamic Stability of Inverted Annular Flow in an Adiabatic Simulation

1986 ◽  
Vol 108 (1) ◽  
pp. 84-92 ◽  
Author(s):  
G. De Jarlais ◽  
M. Ishii ◽  
J. Linehan
Keyword(s):  
Annular Flow ◽  
Liquid Jets ◽  
Droplet Flow ◽  
Free Jet ◽  
Jet Stability ◽  
Water Jets ◽  
Droplet Stability ◽  
Droplet Sizes ◽  
Data Points ◽  
Turbulent Water

Inverted annular flow was simulated adiabatically with turbulent water jets, issuing downward from large aspect ratio nozzles, enclosed in gas annuli. Velocities, diameters, and gas species were varied, and core jet length, shape, breakup mode, and dispersed core droplet sizes were recorded at approximately 750 data points. Inverted annular flow destabilization led to inverted slug flow at low relative velocities, and to dispersed droplet flow at high relative velocities. For both of these transitions from inverted annular flow, core breakup length correlations were developed by extending work on free liquid jets to include this coaxial, jet disintegration phenomenon. The results show length dependence upon DJ, ReJ, WeJ, α, and WeG,rel. Correlations for core shape, breakup mechanisms, and dispersed core droplet size were also developed, by extending the results of free jet stability, roll wave entrainment, and churn turbulent droplet stability studies.

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