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1-18 of 18
Keywords: air bubble
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Proceedings Papers
Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-326
... is created by liquid coming into contact with the solid structure, it is more challenging to ascertain how an isolated air pocket is pressurised by an impulsive impact, and how the maximum impact pressure inside this bubble evolves. We study such a Bagnold-type impulsive compression of an air bubble...
Proceedings Papers
Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-588
... sensor. It might be related with the mass of wave and the sensing area of pressure sensor. The high impact pressures are observed in 0 and +2cm locations excepting -2cm location. It is well known that an air bubble generated extremely high impact pressure. The force and pressure signals have...
Proceedings Papers
Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-627
... A Hydrodynamic Design Method of Ship Applying the Air Lubrication System Chiharu Kawakita1 1National Maritime Research Institute (NMRI) Tokyo, Japan ABSTRACT The air lubrication system (hereafter ALS), which reduces frictional drag by mixing air bubbles of millimeter order into the flow around...
Proceedings Papers
Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-675
... ABSTRACT The method of dissolving oxygen in water (liquid), which is one of the methods for improving the water quality environment for closed water bodies, is through using air bubbles. As a result of using water flow generated by gravity as means for supplying air bubbles into water without...
Proceedings Papers
Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-195
... simulation of flow around ship with the air lubrication system (hereafter, this is called ALS) in self- propulsion condition by combining Reynolds average Navier-Stokes equation(RANS) with the air bubble flow model, the frictional drag resistance reduction model and the propeller model. This paper describes...
Proceedings Papers
Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-234
... of the main parameters in the coastal morphology changes, especially under a plunging breaking waves, which will generate high intensity of turbulence and traps a large amount of air into the water. The entrained air quickly bursts into small air bubbles to interact with the surrounding flow and thus enhance...
Proceedings Papers
Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-157
... slamming force acting on cylindrical piles can be written as (Eq. 2, Goda et al., 1966). experimental result renewable energy variation impact force surface elevation air bubble wave force cfd model dynamic amplification total force back vertical member total wave force coefficient...
Proceedings Papers
Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-158
...) laboratory experiment thickness imaging brine production monitoring sea ice oil entrainment porosity diameter experiment production control chemical spill ice thickness salinity brine layer upstream oil & gas ice sample tank reservoir surveillance oil injection crude oil air bubble...
Proceedings Papers
Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-490
... Abstract This paper reports on the development of an acoustic sea ice thickness measurement sensor. The development is applying acoustic Non-Destructive-Testing (NDT) techniques to test first year sea ice including significant amounts of enclosed air bubbles. Two single piezoelectric...
Proceedings Papers
Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-150
... of retaining an oil spill even in strong currents. A 12 m long grating of 5 pipes at 2.4 m depth with a total air flux of 10.8 Nm 3 /min, blocked a spill in surface currents up to 57 cm/s. leirvik air bubble oil spill surface outflow air flux pipe chemical spill breakthrough speed field test...
Proceedings Papers
Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-262
... on the position of the particles. particle reservoir simulation basic lsm hybrid particle level particle level interface upstream oil & gas air bubble restriction comput equation negative particle reservoir characterization gradient correction accuracy applicability fluid dynamics...
Proceedings Papers
Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-041
... attention on this phenomenon during structure design and maintenance of the LWS. Keywords: Structure characteristics, silty marine sediment, lightweight air-mixed soil (LWS), density INTRODUCTION A lightweight air-mixed soil (LWS) is prepared by mixing air bubbles and water with construction waste...
Proceedings Papers
Paper presented at the The Nineteenth International Offshore and Polar Engineering Conference, July 21–26, 2009
Paper Number: ISOPE-I-09-032
... computational mesh cfd multiphase model fluid dynamics air bubble liquified natural gas upstream oil & gas pressure history isope 2009 computational model cross-section simulation mesh ISOPE 2009 Sloshing Comparative Study: Simulation of Lateral Sloshing with Multiphase CFD Bernhard...
Proceedings Papers
Paper presented at the The Seventeenth International Offshore and Polar Engineering Conference, July 1–6, 2007
Paper Number: ISOPE-I-07-068
... water line frame 1 latent heat ballast tank water ballast tank air bubble hull surface Market demand for vessels operating in cold region has increased recently because of rapid rise in price of oil and gas. These vessels have the water ballast tanks designed to operate under the harsh...
Proceedings Papers
Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-031
... accelerator system free surface reservoir simulation test section cwc accelerator system plane air bubble pressure distribution computed result configuration rotor turbulence model computation impeller upstream oil & gas velocity distribution guide vane Paper No. 2006-CY-02 Chen 1 CFD...
Proceedings Papers
Paper presented at the The Fifteenth International Offshore and Polar Engineering Conference, June 19–24, 2005
Paper Number: ISOPE-I-05-278
... ABSTRACT Numerical simulation is performed on the flow behaviors of a largescale submerged air bubble uprising in the water column until its burst. The submerged air bubble starts rising from where the static water pressure is 2kpa beyond the atmosphere pressure and goes up to the static free...
Proceedings Papers
Paper presented at the The Fourteenth International Offshore and Polar Engineering Conference, May 23–28, 2004
Paper Number: ISOPE-I-04-108
... technique for oil recovery. In this method, it is proposed to remove oil from recesses by introducing air bubbles and flush out through relative velocity between ice floes and seawater. A series of laboratory experiments were carried out to investigate the behavior of oil and air bubbles. INTRODUCTION...
Proceedings Papers
Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-305
... ABSTRACT The wave breaking-induced dynamic pressure due to a submerged trapezoidal breakwater is investigated experimentMly relating to the properties of the entrained air bubbles in this study. Experimental results have revealed that high frequency components of the dynamic pressure...