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Keywords: void fraction
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Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-3175
..., and it is important to accurately capture detail. Secondly, the void fraction was computed in order to study how complex flow phenomena such as jet, splash, and flow separation. To the air is entrained during the wave breaking for the initial steepness 0.4 achieve high resolution, it can only be achieved by refining...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-225
... the Reynolds equations for turbulent flow fields and employs the volume-of-fluid (VOF) method to track free surfaces. The integral properties of bubble plume are investigated and compared with the experimental data. The void fraction distributions are examined and the relationship between the void fractions...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-174
... on the vertical wall of model above the still water level. Bubble image velocimetry (BIV) was used to reveal the aerated flow field. Fiber optic reflectometer (FOR) was applied to measure the void fraction in front of the end surface of each pressure surface. Notably, BIV, FOR, and pressure measurements were...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-254
... of the balloon arrays experiments were performed in tow water flume in NTU. bubble curtain void fraction offshore wind farm frequency range low-frequency noise bubbly water sustainability attenuation prosperetti underwater noise reduction social responsibility balloon array fraction water...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-403
... and in aerated water. There is significant reduction of the maximum pressures from those measured in pure water to those measured in aerated water. KEY WORDS: Slamming; pressure; force; jet formation; aeration; void fraction. INTRODUCTION Slamming of an impact plate into pure water has been investigated over...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-217
... void fraction equation liquid-ga physical parameter pipeline-riser system simulation surface tension pipeline-riser system song gao 1 kerosene fraction liquid upstream oil & gas riser slug production us government physical parameter Influence of Liquid-Gas Physical Parameters...
Proceedings Papers

Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-337
... ABSTRACT: This work presents a novel fiber-optic sensing system to measure the local air-volume (void) fraction of bubbly flows caused by breaking waves near a submerged breakwater. Initially, a sensing system with a single fiber-optic probe is developed to detect the local void fractions...
Proceedings Papers

Paper presented at the The Eighteenth International Offshore and Polar Engineering Conference, July 6–11, 2008
Paper Number: ISOPE-I-08-140
... Void Fraction in Green Water Kuang-An Chang Zachry Department of Civil Engineering, Texas A&M University College Station, Texas, USA Yonguk Ryu River and Coast Research Division, Korea Institute of Construction Technology Goyang, Gyeonggi-Do, Korea ABSTRACT The present study investigates the void...
Proceedings Papers

Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-072
... is not so large and was neglected. Governing equations are expressed as follow. Conservation of mass 8 c3 (paota + PLaLz(paataua +pLC~LUL)= 0 (1) c~t Where t is the time, z is the vertical upward coordinate along the flow direction, u is the velocity, p is the density, a is the void fraction and suffix G, L...
Proceedings Papers

Paper presented at the The Eighth International Offshore and Polar Engineering Conference, May 24–29, 1998
Paper Number: ISOPE-I-98-215
... Measurements of bubbles caused by wave breaking processes under various sea-state conditions were made by the Naval Research Laboratory during the Sandy Duck "97 Experiment at Duck, NC. Eight arrays consisting of void fraction meters, acoustic resonators, and thermistors were deployed in an area...
Proceedings Papers

Paper presented at the The Seventh International Offshore and Polar Engineering Conference, May 25–30, 1997
Paper Number: ISOPE-I-97-471
... upstream oil & gas liquid level gas recycling gas removal enhanced recovery void fraction separation gas cycling pipe production control production logging impeller underwater-welding appfication coefficient production monitoring volumetric flow rate reservoir surveillance welding...
Proceedings Papers

Paper presented at the The Seventh International Offshore and Polar Engineering Conference, May 25–30, 1997
Paper Number: ISOPE-I-97-086
... from 0.083 Nm 3 /s to 0.75 Nm 3 /s, corresponding in scale to that expected from a full pipeline rupture or blowouts from shallow pockets. Measurements of water velocities and void fractions were performed in the vertical bubble plume and in the horizontal surface flow. The gas concentration above...
Proceedings Papers

Paper presented at the The Fifth International Offshore and Polar Engineering Conference, June 11–16, 1995
Paper Number: ISOPE-I-95-197
... for the technique that directly measures the percentage of air content (void fraction) under a pre-fixed depth below the sea surface The data form such void fraction measurements conducted in the open sea under moderate to high sea state were processed to obtain several breaking wave statistics A comparison...
Proceedings Papers

Paper presented at the The Fourth International Offshore and Polar Engineering Conference, April 10–15, 1994
Paper Number: ISOPE-I-94-182
... pressure drop upstream oil & gas back emf magnetic field production control current density fluid velocity conductivity test section production monitoring magnet flowrate reservoir surveillance expenment void fraction thruster Proceedings of the Fourth (1994) International Offshore...
Proceedings Papers

Paper presented at the The Third International Offshore and Polar Engineering Conference, June 6–11, 1993
Paper Number: ISOPE-I-93-116
... are not unusual), and favour the choice of development schemes based on few, high flowrate subsea completions. module differential pressure multiphase production recoverable reserve installation void fraction hydraulic jet pump subsea system upstream oil & gas hydrobooster system platform...
Proceedings Papers

Paper presented at the The Third International Offshore and Polar Engineering Conference, June 6–11, 1993
Paper Number: ISOPE-I-93-122
... stress, void fractions and pressure drops respectively. It is also concluded that flow conditions and fluid properties have significant effects on the slug flow characteristics. INTRODUCTION Most oil and gas production has associated water and carbon dioxide which can give rise to flow related...
Proceedings Papers

Paper presented at the The Third International Offshore and Polar Engineering Conference, June 6–11, 1993
Paper Number: ISOPE-I-93-117
... is the transit time of the front between the measuring stations and ai is the void fraction in the liquid body at station i. The velocities V are defined in figure 6. The final value for the entrainment rates in one ex- periment is taken as the mean of all the computed values. This method of analysis is based...
Proceedings Papers

Paper presented at the The Third International Offshore and Polar Engineering Conference, June 6–11, 1993
Paper Number: ISOPE-I-93-118
... void fraction from the on- line system corresponds with the results from the time trace analysis. In the online computations in this case a high trigger level was set to discriminate the slugs with a characteristic low holdup. These were captured by the time trace analysis with a low trigger level...

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