نتایج جستجو برای: bubble point pressure

تعداد نتایج: 928201  

Journal: :Journal of Petroleum Exploration and Production Technology 2021

Abstract The bubble point pressure is essential for planning and managing oil field development production strategies. conventional procedure of the determination volume a trial-and-error method. Consequently, this leads to lack uniqueness, accuracy, repeatability solution. This paper describes new technique that utilizes pressure–volume (PV) data obtained from constant-composition expansion (C...

2004
Christopher E. Brennen

This paper presents a summary of some recent observations of the interaction between individual traveling cavitation bubbles and the nearly solid surface. These reveal a complex micro-fluid-mechanics associated withThe interaction of the bubble with the boundary layer, the surface and the large pressure gradients exterior to the boundary layer which normally occur in the vicinity of a minimum p...

2002
SRIDHAR GOPALAKRISHNA

An analysis was performed of the rise characteristics of bubbles, which are also growing, in a pressure Iield which is decreasing exponentially with time. The bubble rise and growth occur due to flash evaporation caused by reducing the pressure in the vapor space above a pool of liquid. Basset’s bubble momentum equation was modified to include the effects of the generated pressure wave, and to ...

Journal: :iranian endodontic journal 0
maryam javidi department of endodontics, dental school, dental research center, mashad university of medical sciences, mashad, iran neda naghavi department of endodontics, dental school, mashad university of medical sciences, mashad, iran ehsan roohani department of restorative dentistry, dental school, mashad university of medical sciences, mashad, iran

introduction: there are several methods for evaluating microleakage in dentistry, for example dye or bacterial leakage, electro-chemical methods, radioisotope labeling and fluid filtration. the purpose of this study was to assemble the fluid filtration system for quantitative evaluation of microleakage in dental materials. materials and methods: the roots were connected to a tube filled with an...

Journal: :Journal of fluid mechanics 2007
Evert Klaseboer Siew Wan Fong Cary K Turangan Boo Cheong Khoo Andrew J Szeri Michael L Calvisi Georgy N Sankin Pei Zhong

The dynamic interaction of a shockwave (modelled as a pressure pulse) with an initially spherically oscillating bubble is investigated. Upon the shockwave impact, the bubble deforms non-spherically and the flow field surrounding the bubble is determined with potential flow theory using the boundary-element method (BEM). The primary advantage of this method is its computational efficiency. The s...

2000
John Hazlehurst

The buoyant rise of thermals (i.e. bubbles of enhanced entropy, but initially in pressure equilibrium) is investigated numerically in three dimensions for the case of an adiabatically stratified layer covering 6–9 pressure scale heights. It is found that these bubbles can travel to large heights before being braked by the excess pressure that builds up in order to drive the gas sideways in the ...

2010
Shinichi TSUDA Takashi TOKUMASU Shu TAKAGI Yoichiro MATSUMOTO

Bubble nucleation phenomenon in presence of gas impurities is studied by microcanonical molecular dynamics simulation for Lennard-Jones fluid. First, we investigate effect of molecular diameter of dissolved gas on the nucleation rate with pressure change. As a result, we find increase of the nucleation rate with increase of the pressure, which we call "inverse" pressure phenomenon, when interac...

2013
Shu-che Peng Shailesh P. Nagarkar Justin L. Lowen Sachin S. Velankar

We explore the microfluidic generation of bubbles in a flow-focusing junction using a pressure-controlled device rather than the more common flow ratecontrolled devices. This device is a prototype for extending microfluidic drop generation methods to molten polymers. We show that the bubble generation process is highly sensitive to pressure: small changes in pressure induce large changes in bub...

2001
Axel Brandenburg John Hazlehurst

The buoyant rise of thermals (i.e. bubbles of enhanced entropy, but initially in pressure equilibrium) is investigated numerically in three dimensions for the case of an adiabatically stratified layer covering 6–9 pressure scale heights. It is found that these bubbles can travel to large heights before being braked by the excess pressure that builds up in order to drive the gas sideways in the ...

Journal: :Engineering Letters 2008
Arman Raoufi Mehrzad Shams Reza Ebrahimi

computational scheme is used to study the bubble trajectories. The 2D averaged Navier stokes equations are solved. The SIMPLEC algorithm is used to relate the pressure to velocity. A one-way coupling is assumed and the effects of the bubbles on carrier flow are neglected. The bubble equation of motion includes the drag, buoyancy, pressure gradient, Saffman lift and bubble volume change forces. ...

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