scholarly journals Numerical Investigation on Kinetics of Gas-Liquid Interface and Drainage Suppression of Liquid Film as Approach of a Single Bubble to a Flat Wall

2018 ◽  
Vol 32 (1) ◽  
pp. 80-88
Author(s):  
Motoki KOYAMA ◽  
Kazuyasu SUGIYAMA ◽  
Tomoaki WATAMURA ◽  
Fumiya IWATSUBO ◽  
Shu TAKAGI
Keyword(s):  
Liquid Film ◽  
Numerical Investigation ◽  
Liquid Interface ◽  
Single Bubble ◽  
Flat Wall ◽  
Kinetics Of

An Organodiselenide Containing Electrolyte Enables Sulfurized Polyacrylonitrile Cathodes with Fast Redox Kinetics in Li-S batteries

2021 ◽  
Author(s):  
Wei Zhang ◽  
Qiang Wu ◽  
Ziqi Zeng ◽  
Chuang Yu ◽  
Shijie Cheng ◽  
...  
Keyword(s):  
Liquid Interface ◽  
Electrolyte Additive ◽  
Redox Kinetics ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Kinetics Of

A soluble organoselenide compound, phenyl diselenide (PDSe), is employed as a soluble electrolyte additive to enhance the kinetics of sulfurized polyacrylonitrile cathode, in which radical exchange in the solid-liquid interface...

NUMERICAL INVESTIGATION OF FILM DISTRIBUTION IN HORIZONTAL-TUBE FALLING FILM EVAPORATOR

2011 ◽  
Vol 19 (03) ◽  
pp. 177-183 ◽  
Author(s):  
JIN-BO CHEN ◽  
QING-GANG QIU
Keyword(s):  
Numerical Simulation ◽  
Fluid Flow ◽  
Film Thickness ◽  
Liquid Film ◽  
Numerical Investigation ◽  
Horizontal Tube ◽  
Flow Density ◽  
Falling Film ◽  
Film Distribution ◽  
Simulation Results

The technique of horizontal-tube falling film has been used in the cooling and heating industries such as refrigeration systems, heating systems and ocean thermal energy conversion systems. The comprehensive performance of evaporator is directly affected by the film distribution characteristics outside tubes. In this paper, numerical investigation was performed to predict the film characteristics outside the tubes in horizontal-tube falling film evaporator. The effects of liquid flow rate, tube diameter and the circular degree of tube on the film thickness were presented. The numerical simulation results were compared with that of the empirical equations for calculating the falling film thickness, and agreements between them were reasonable. Numerical simulation results show that, at the fixed fluid flow density, the liquid film is thicker on the upper and lower tube and the thinnest liquid film appears at angle of about 120°. The results also indicate that, when the fluid flow density decreases to a certain value, the local dryout spot on the surface of the tube would occur. In addition, the film thickness decreases with the increases of the tube diameter at the fixed fluid flow density.

scholarly journals On mechanism of the bubble bouncing from hydrophilic and hydrophobic solid surfaces

2015 ◽  
Vol 70 (1) ◽  
Author(s):  
Jan Zawała ◽  
Piotr Zawała ◽  
Kazimierz Małysa
Keyword(s):  
Liquid Film ◽  
Solid Surfaces ◽  
Deformation Degree ◽  
Bubble Deformation ◽  
Surface Time ◽  
The Moment ◽  
Highly Hydrophobic ◽  
Energy Dissipated ◽  
Bubble Collision ◽  
Kinetics Of

AbstractThe kinetics of collision and bouncing of an air bubble on hydrophilic and hydrophobic solid surfaces immersed in distilled water is reported. We carried out the experiments and compared the bubble collision and bouncing courses on the stagnant and vibrating, with a controlled frequency and amplitude, solid/liquid interface. For stagnant interface differences in the outcome of the bubble collisions with hydrophilic and hydrophobic solid surfaces are resulting from different stability of the intervening liquid film formed between the colliding bubble and these surfaces. The liquid film was unstable at Teflon surface, where the three-phase contact (TPC) and the bubble attachment were observed, after dissipation of most of the kinetic energy associated with the bubble motion. For vibrated solid surface it was shown that kinetics of the bubble bouncing is independent on the hydrophilic/hydrophobic properties of the surface. Similarly like at water/glass hydrophilic interface, even at highly hydrophobic Teflon surface time of the bubble collisions and bouncing was prolonged almost indefinitely. This was due to the fact that the energy dissipated during the collision was re-supplied via interface vibrations with a properly adjusted acceleration. The analysis of the bubble deformation degree showed that this effect is related to a constant bubble deformation, which determined constant radius of the liquid film, large enough to prevent the draining liquid film from reaching the critical thickness of rupture at the moment of collision. The results obtained prove that mechanism of the bubble bouncing from various interfaces depends on interrelation between rates of two simultaneously going processes: (i) exchange between kinetic and surface energies of the system and (ii) drainage of the liquid film separating the interacting interfaces.

Studying the kinetics of the ion transfer across the liquid|liquid interface by means of thin film-modified electrodes

2005 ◽  
Vol 7 (11) ◽  
pp. 1122-1128 ◽  
Author(s):  
Valentin Mirčeski ◽  
François Quentel ◽  
Maurice L’Her ◽  
Annig Pondaven
Keyword(s):  
Thin Film ◽  
Modified Electrodes ◽  
Liquid Interface ◽  
Ion Transfer ◽  
Kinetics Of

Kinetics of soil ozonation: an experimental and numerical investigation

2004 ◽  
Vol 72 (1-4) ◽  
pp. 227-243 ◽  
Author(s):  
Won-Tae Shin ◽  
Xandra Garanzuay ◽  
Sotira Yiacoumi ◽  
Costas Tsouris ◽  
Baohua Gu ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Soil Ozonation ◽  
Kinetics Of

Experimental and Numerical Investigation of Damage on an Aluminum Surface by Single-Bubble Cavitation

2018 ◽  
Vol 7 (5) ◽  
pp. 20180038 ◽  
Author(s):  
Hemant J. Sagar ◽  
Stefanie Hanke ◽  
Martin Underberg ◽  
Chaojie Feng ◽  
Ould el Moctar ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Single Bubble ◽  
Aluminum Surface ◽  
Bubble Cavitation
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