نتایج جستجو برای: wettability

تعداد نتایج: 4689  

2006
J. Chen G. J. Hirasaki M. Flaum

Wettability and NMR surface relaxation are related to each other. Wettability controls the fluid distribution in porous media. NMR surface relaxation dictates that the fluid in contact with the mineral surface has a relaxation time shorter than its bulk value. In this study, first, the nature of wettability effect on NMR responses was demonstrated by a parameter ρ2, eff, the effective surface r...

2015
Kaushalkumar Bhavsar Duncan Ross Radhakrishna Prabhu Pat Pollard

BACKGROUND Wettability is an important property of solid materials which can be controlled by surface energy. Dynamic control over the surface wettability is of great importance for biosensing applications. Zinc oxide (ZnO) is a biocompatible material suitable for biosensors and microfluidic devices. Nanowires of ZnO tend to show a hydrophobic nature which decelerates the adhesion or adsorption...

Journal: :نشریه دانشکده فنی 0
علی صابری حسین سرپولکی فرهاد گلستانی فرد

low water-wettability and oxidation resistance of graphite have limited its application in carbon containing refractory castables. the aims of this study were improvement of water-wettability and the oxidation resistance of natural flaky graphite by applying an oxide coating on its surface. to develop the coating, magnesium aluminate spinel sol was formulated via a citrate-nitrate route and gra...

Journal: :Soft matter 2015
Jiale Yong Feng Chen Qing Yang Xun Hou

Femtosecond laser microfabrication is emerging as a hot tool for controlling the wettability of solid surfaces. This paper introduces four typical aspects of femtosecond laser induced special wettability: superhydrophobicity, underwater superoleophobicity, anisotropic wettability, and smart wettability. The static properties are characterized by the contact angle measurement, while the dynamic ...

Journal: :international journal of nano dimension 0
g. cheraghian young researchers and elite club, omidieh branch, islamic azad university, omidieh, iran.

recently, a renewed interest arises in the application of nanotechnology for the upstream petroleum industry. in particular, adding nanoparticles to fluids may drastically benefit enhanced oil recovery and improve well drilling, by changing the properties of the fluid, rocks wettability alteration, advanced drag reduction, strengthening the sand consolidation, reducing the inter-facial tension and...

Journal: :iranian journal of oil & gas science and technology 2014
mohsen seid mohammadi jamshid moghadasi amin kordestany

wettability alteration is an important method for increasing oil recovery from oil-wet carbonatereservoirs. chemical agents like surfactants are known as wettability modifiers in carbonate systems.oil can be recovered from initially oil-wet carbonate reservoirs by wettability alteration from oil-wetto water-wet condition with adding dilute surfactant and electrolyte solutions. this paper invest...

2009
Sadaaki Ekuni Jun-ichi Hirai

The possibility of alloying can not be avoided at the interface between molten brazing filler metal and base metal in brazing, so the wettability of brazing filler metal can not be easily explained theoretically. We used the original apparatus for wettability test and investigated the relation between the wettability of brazing filler metals of Ag-P-Cu and Ag-Cu-Zn-Cd systems on copper and the ...

2004
R. W. HEMINGWAY

The surface wettabiJity and fats of yellow bird1wood were examined in an attempt to illustrate how heat-induced d1anges in wood fats might be related to d1anges in surface wettability. A marked reduction of surface wettability accompan;ed heating of yellow birchwood. The degree of water repellency imparted to the waod was highly dependent upon heating temperature and time. Acetone extraction of...

2004
Hisaaki Takao Toshihiko Tsukada Keiichi Yamada Masahiko Yamashita Hideo Hasegawa

A new wettability evaluating system was developed by combining a contact angle measurement instrument, which optically and insitu measures the contact angle of molten solder, with a conventional wettability tester (meniscograph). Using this new evaluation system, a well-known experiential knowledge that the wettability for Sn-3.5Ag, a typical Pbfree solder, is inferior to that for Sn-37Pb is qu...

2005
Matthew D. Jackson Martin J. Blunt

We use a pore-scale network model in conjunction with conventional reservoir-scale simulations to investigate wettability variation within an oil/water transition zone. If the initial water saturation within the transition zone is controlled by primary drainage, we predict that initial production behavior is the same regardless of wettability. However, if the initial water saturation has been m...

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