Depth of penetration of bubbles entrained by an oscillated plunging water jet

The difficulty in finding clean water is issued to become Indonesia’s problem in 2025. Seawater processing to produce clean water for commonly used or called water desalination will be a promising solution to solve the problem of clean water scarcity. One of the seawater desalination processes is to utilize micro-bubbles generated from air entrainment. Air entrainment is a phenomenon where the surrounding air is trapped in the water and forms a bubble. Using the vertical plunging jet setup will lead to bubble formation as a result of the collision between the vertical water jet and the pond surface below it. This study determines the effect of downcomer diameter on the parameters that influence the parameter of air entrainment quality by using a vertical plunging jet configuration. Some set up tools that support research consists of pumps, nozzle, downcomer, airflow meter, anemometer, and water pond. Results of the research are in the form of qualitative data such as videos and photos, by using a high-speed camera with backlighting. The qualitative data obtained will be processed with an image processing program to acquire quantitative data. The results of the study revealed that the downcomer diameter affects the air entrainment rate. On the other hand, jet velocity affects the area of dispersion and depth of penetration.

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Depth of penetration of bubbles entrained by a plunging water jet

Physics of Fluids ◽

10.1063/1.869336 ◽

1997 ◽

Vol 9 (7) ◽

pp. 1864-1866 ◽

Cited By ~ 23

Author(s):

Christophe Clanet ◽

Juan C. Lasheras

Keyword(s):

Water Jet ◽

Depth Of Penetration ◽

Plunging Water Jet

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Validation of NEPTUNE_CFD Module with Data of a Plunging Water Jet Entering a Free Surface

Nuclear Technology ◽

10.13182/nt09-a8851 ◽

2009 ◽

Vol 167 (1) ◽

pp. 60-70 ◽

Cited By ~ 1

Author(s):

M. C. Galassi ◽

D. Bestion ◽

C. Morel ◽

J. Pouvreau ◽

F. D’Auria

Keyword(s):

Free Surface ◽

Water Jet ◽

Plunging Water Jet

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The Effects of Water Flow Rate On The Air Entrainment Process From Vertical Plunging Water Jet With Downcomer

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/268/1/012157 ◽

2019 ◽

Vol 268 ◽

pp. 012157

Author(s):

Budiarso ◽

Warjito ◽

Bima Putra Pamungkas

Keyword(s):

Water Flow ◽

Flow Rate ◽

Water Flow Rate ◽

Air Entrainment ◽

Water Jet ◽

Plunging Water Jet ◽

Entrainment Process

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Effect of Process Parameters on Depth of Penetration & Surface Roughness in Abrasive Waterjet Cutting of Copper

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.895.301 ◽

2019 ◽

Vol 895 ◽

pp. 301-306

Author(s):

Keshav Kashyap ◽

S. Srinivas

Keyword(s):

Surface Roughness ◽

Mass Flow Rate ◽

Mass Flow ◽

Process Parameters ◽

Flow Rate ◽

Traverse Speed ◽

High Water ◽

Water Jet ◽

Abrasive Waterjet ◽

Depth Of Penetration

This study evaluates the effect of process parameters on depth of penetration and surface roughness in abrasive waterjet (AWJ) cutting of copper. Full factorial experiments are carried out on trapezoidal blocks for each of the three abrasive particle sizes used. Experimental parameters - abrasive mass flow rate, water jet pressure and traverse speed are varied at three levels. Main effects and contributions of process parameters to depth of penetration and surface roughness is calculated. From the data, it is observed that, high abrasive mass flow rate, high water jet pressure and low traverse speed resulted in higher depth of penetration and a high abrasive mass flow rate, high water jet pressure and low traverse speed resulted in lesser Ra value. Using experimental data a statistical model for predicting depth of penetration & surface roughness is developed. Error between experimental and statistical values are compared to validate the statistical model. The maximum DOP of 49.32mm was observed at AMFR=405.4 g/min, P=300 MPa, TS=60 mm/min, MS=60 Mesh and minimum DOP of 4.27mm was observed at AMFR=200 g/min, P=100 MPa, TS=90 mm/min, MS=80 Mesh.

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