scholarly journals Deformation of liquid droplets and gas bubbles in electric fields. Research report No. 1

1976 ◽  
Author(s):  
T.B. Jones ◽  
M.J. McCarthy
Keyword(s):  
Electric Fields ◽  
Gas Bubbles ◽  
Research Report ◽  
Liquid Droplets

Measurement of Interactions between Solid Particles, Liquid Droplets, and/or Gas Bubbles in a Liquid using an Integrated Thin Film Drainage Apparatus

Langmuir ◽  
2013 ◽  
Vol 29 (11) ◽  
pp. 3594-3603 ◽  
Author(s):  
Louxiang Wang ◽  
David Sharp ◽  
Jacob Masliyah ◽  
Zhenghe Xu
Keyword(s):  
Thin Film ◽  
Gas Bubbles ◽  
Solid Particles ◽  
Liquid Droplets ◽  
Film Drainage

The extended Rayleigh theory of the oscillation of liquid droplets

1981 ◽  
Vol 104 ◽  
pp. 295-309 ◽  
Author(s):  
C. A. Morrison ◽  
R. P. Leavitt ◽  
D. E. Wortman
Keyword(s):  
Dielectric Constant ◽  
Electric Field ◽  
Frequency Shift ◽  
Electric Fields ◽  
Optical Field ◽  
Liquid Droplets ◽  
Dynamical Equations ◽  
Resonant Frequencies ◽  
Small Oscillations ◽  
Liquid Drops

The Rayleigh theory of oscillation of liquid drops is extended to include the effects of viscosity and a uniform external electric field. The resonant frequencies of the modes of the drop are shown to be shifted by the electric field. The magnitude and sign of the frequency shift depends on the dielectric constant of the drop. The condition for instability of drops in large electric fields is given and found to differ from that given by previous workers. This difference is attributed to the assumption by previous workers that the drops, under the influence of an electric field, distort into ellipsoids of revolution about the field direction. The dynamical equations are derived and the solution for small oscillations is given in an oscillating field and in an amplitude-modulated optical field.

A Microfluidic Model of Cardiovascular Bubble Lodging

2007 ◽  
Author(s):  
Joseph L. Bull ◽  
Andre´s J. Caldero´n ◽  
Yun Seok Heo ◽  
Dongeun Huh ◽  
Nobuyuki Futai ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Blood Flow ◽  
Renal Carcinoma ◽  
Gas Bubbles ◽  
Driving Pressure ◽  
Liquid Droplets ◽  
Pass Through ◽  
Theoretical Analyses ◽  
Tumor Microcirculation

Embolotherapy involves the occlusion of blood flow to tumors to treat a variety of cancers, including renal carcinoma and hepatocellular carcinoma. The accompanying liver cirrhosis makes the treatment of hepatocellular carcinoma by traditional methods difficult. Previous attempts at embolotherapy have used solid emboli. A major difficulty in embolotherapy is restricting delivery of the emboli to the tumor. We are developing a novel minimally invasive gas embolotherapy technique that uses gas bubbles rather than solid emboli. The bubbles originate as encapsulated liquid droplets that are small enough to pass through capillaries. The droplets can be selectively vaporized in vivo by focused high intensity ultrasound to form gas bubbles which are then sufficiently large to lodge in the tumor vasculature. We investigated the dynamics of bubble lodging in microfluidic model bifurcations made of poly(dimethylsiloxane) and in theoretical analyses. The results show that the critical driving pressure below which a bubble will lodge in a bifurcation is significantly less than the driving pressure required to dislodge it. Based these results, we estimate that gas bubbles from embolotherapy can lodge in vessels 20 μm or smaller in diameter, and conclude that bubbles may potentially be used to reduce blood flow to tumor microcirculation.

scholarly journals Rational Synthesis of Large-Area Periodic Chemical Gradients for the Manipulation of Liquid Droplets and Gas Bubbles

2018 ◽  
Vol 28 (8) ◽  
pp. 1705564 ◽  
Author(s):  
Karla Perez-Toralla ◽  
Abhiteja Konda ◽  
John J. Bowen ◽  
Emily E. Jennings ◽  
Christos Argyropoulos ◽  
...  
Keyword(s):  
Gas Bubbles ◽  
Liquid Droplets ◽  
Large Area ◽  
Chemical Gradients

The Effect of Electric Fields on the Radiolysis of Acetylene, and the Mechanism of Cuprene Formation

1971 ◽  
Vol 49 (23) ◽  
pp. 3789-3794 ◽  
Author(s):  
J. P. Briggs ◽  
R. A. Back
Keyword(s):  
Electron Microscope ◽  
Electric Field ◽  
Gas Phase ◽  
Electric Fields ◽  
Reaction Vessel ◽  
Liquid Droplets ◽  
Pressure Decrease ◽  
Γ Rays

Gaseous acetylene at pressures of about 200 Torr was irradiated with γ-rays at doserates between about 1011 and 1012 eV/cc s, with and without an electric field applied. The deposition of cuprene on the bottom of the reaction vessel was markedly affected by the field, but the rate of cuprene formation as measured by the pressure decrease was unchanged. Examination of the cuprene deposit with an electron microscope showed it to consist of rather uniform spheres averaging about 3000 Å in diameter, with each containing an estimated 2 × 108 molecules of acetylene. The mechanism of cuprene formation is discussed, and it is suggested that it does not proceed through a direct polymerization of acetylene, but involves a secondary polymerization of polyene intermediates, in the gas phase and after their condensation in liquid droplets.

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