Liquid fraction profile in a liquid foam under an applied voltage

2018 ◽  
Vol 3 (11) ◽  
Author(s):  
Anne-Laure Biance ◽  
Oriane Bonhomme
Keyword(s):  
Applied Voltage ◽  
Liquid Fraction ◽  
Liquid Foam

scholarly journals How Topological Rearrangements and Liquid Fraction Control Liquid Foam Stability

2011 ◽  
Vol 106 (6) ◽  
Author(s):  
Anne-Laure Biance ◽  
Aline Delbos ◽  
Olivier Pitois
Keyword(s):  
Foam Stability ◽  
Liquid Fraction ◽  
Liquid Foam

Local effects of gravity on foams

2013 ◽  
Vol 737 ◽  
pp. 1-18 ◽  
Author(s):  
Michael J. Davis ◽  
Peter S. Stewart ◽  
Stephen H. Davis
Keyword(s):  
Gas Phase ◽  
Liquid Fraction ◽  
Liquid Films ◽  
Local Effects ◽  
Drainage Flow ◽  
Gravitational Effects ◽  
Minimum Film Thickness ◽  
The Stability ◽  
Free Films ◽  
Liquid Foam

AbstractThe stability of a two-dimensional surfactant-free (gas–liquid) foam in a gravitational field is considered. The foam is assumed to have low liquid fraction, so the gas phase can be divided into approximately polygonal bubbles separated by thin liquid films. These free films drain toward accumulations of liquid at the bubble vertices, the Plateau borders, and eventually rupture due to van der Waals intermolecular attractions; this drives foam coarsening through the coalescence of neighbouring bubbles. In particular, we demonstrate how gravitational effects strongly modify the shape of the Plateau border interfaces and enhance the drainage flow in the liquid films, driving non-uniform thinning with exponential decay of the minimum film thickness, significantly faster than the power-law thinning predicted when gravitational effects are negligible.

scholarly journals Analysis of the foam-forming of non-woven lightweight fibrous materials using X-ray tomography

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
S. R. Burke ◽  
M. E. Möbius ◽  
T. Hjelt ◽  
J. A. Ketoja ◽  
S. Hutzler
Keyword(s):  
Compressive Strength ◽  
Liquid Fraction ◽  
Three Dimensional ◽  
Ct Scanning ◽  
Fibrous Materials ◽  
Cellulose Fibres ◽  
Acoustic Insulation ◽  
Foam Forming ◽  
Liquid Foam ◽  
Potential Use

Abstract Foam-forming has in the past predominantly been used to create two-dimensional sheet-like fibrous materials. Allowing the foam to drain freely and decay under gravity, rather than applying a vacuum to remove it rapidly, we can produce lightweight three-dimensional fibrous structures from cellulose fibres, of potential use for thermal and acoustic insulation. $$\mu$$ μ CT scanning of the fibrous materials enable us to determine both void size distributions and also distributions of fibre orientations. Through image analysis and uniaxial compression testing, we find that the orientation of the fibres, rather than the size of the voids, determine the compressive strength of the material. The fibrous samples display a layering of the fibres perpendicular to the direction of drainage of the precursor liquid foam. This leads to an anisotropy of the compressive behaviour of the samples. Varying the initial liquid fraction of the foam allows for tuning of the compressive strength. We show an increase in over seven times can be achieved for samples of the same density (13 kg.m-3). Graphic abstract

FIM OBSERVATION ON THE REACTION OF METALS ( W, Mo ) WITH n-OCTANOL UNDER AN APPLIED VOLTAGE

1987 ◽  
Vol 48 (C6) ◽  
pp. C6-499-C6-504 ◽  
Author(s):  
T. Terao ◽  
F. Iwatsu ◽  
H. Morikawa ◽  
Y. Yashiro
Keyword(s):  
Applied Voltage

PARAMETRIC MODEL OF RESISTANCE OF PLASMA-EROSIVE LOAD, ADEQUATE IN THE WIDE RANGE OF CHANGE OF APPLIED VOLTAGE

2017 ◽  
Vol 2017 (3) ◽  
pp. 3-12 ◽  
Author(s):  
N.A. Shydlovska ◽  
◽  
S.M. Zakharchenko ◽  
O.P. Cherkaskyi ◽  
◽  
...  
Keyword(s):  
Applied Voltage ◽  
Parametric Model ◽  
Wide Range

The Influence of Barrier and Applied Voltage Parameters on the Impulse Surface Discharge Characteristics

2020 ◽  
Vol 11 (11) ◽  
pp. 17-27
Author(s):  
Vadim V. VOEVODIN ◽  
◽  
Marina V. SOKOLOVA ◽  
Viktor R. SOLOV’YEV ◽  
Nikolay Yu. LYSOV ◽  
...  
Keyword(s):  
Applied Voltage ◽  
Voltage Pulse ◽  
Discharge Zone ◽  
Surface Discharge ◽  
Initial Surface ◽  
Barrier Material ◽  
Dielectric Barrier ◽  
Discharge Ignition ◽  
Study Results ◽  
Wide Range

The results from an experimental study of impulse surface discharge occurring in an electrode system containing a dielectric plate are presented. On one of its sides, the plate had a corona-producing electrode made of 50 mm thick copper foil grounded through a current shunt for measuring the discharge current. On its other side, the plate had a high-voltage electrode, to which the voltage from a pulse generator was applied. The article presents the results from measurements of the initial voltage and the sizes of the surface discharge area in air when applying single voltage pulses with different pulse front steepness in the range 0,1–3,4 kV/ms and amplitude in the range 7–15 kV. The measurements were carried out for different dielectric barrier materials with the e values from 2 to 35. The dielectric barrier thickness was 0,9–1,8 mm. The study results have shown that the initial surface discharge ignition voltage depends essentially on the voltage pulse parameters, whereas the barrier characteristics have a weaker effect on this voltage. It has been determined that the discharge has different discharge zone length and different structure depending on the dielectric barrier properties and applied voltage parameters. The streamer zone sizes decrease with increasing the barrier material e value at the same voltage pulse steepness and increase with increasing the steepness for each barrier material. The data obtained for a wide range of external conditions can be used in numerical modeling of discharge.

Increasing corn distillers solubles alters the liquid fraction of the ruminal microbiome

2017 ◽  
Vol 95 (8) ◽  
pp. 3540
Author(s):  
J. C. McCann ◽  
J. R. Segers ◽  
H. Derakhshani ◽  
T. L. Felix ◽  
E. Khafipour ◽  
...  
Keyword(s):  
Liquid Fraction ◽  
Corn Distillers
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