The “Wimple”:  Rippled Deformation of a Fluid Drop Caused by Hydrodynamic and Surface Forces during Thin Film Drainage

Langmuir ◽  
2005 ◽  
Vol 21 (18) ◽  
pp. 8243-8249 ◽  
Author(s):  
Lucy Y. Clasohm ◽  
Jason N. Connor ◽  
Olga I. Vinogradova ◽  
Roger G. Horn
Keyword(s):  
Thin Film ◽  
Surface Forces ◽  
Film Drainage ◽  
Fluid Drop

scholarly journals Hydrodynamic slippage inferred from thin film drainage measurements in a solution of nonadsorbing polymer

2000 ◽  
Vol 112 (14) ◽  
pp. 6424-6433 ◽  
Author(s):  
Roger G. Horn ◽  
Olga I. Vinogradova ◽  
Michael E. Mackay ◽  
Nhan Phan-Thien
Keyword(s):  
Thin Film ◽  
Film Drainage

Inertial effects in thin film drainage

1989 ◽  
Vol 44 (2) ◽  
pp. 387-391 ◽  
Author(s):  
S. Hartland ◽  
S.A.K. Jeelani ◽  
A. Suter
Keyword(s):  
Thin Film ◽  
Inertial Effects ◽  
Film Drainage

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

Thin-film drainage study based on holographic 3D particle tracking

2018 ◽  
Author(s):  
Zhe Wang ◽  
Biagio Mandrachia ◽  
Vincenzo Ferraro ◽  
Ernesto Di Maio ◽  
Pier Luca Maffettone ◽  
...  
Keyword(s):  
Thin Film ◽  
Particle Tracking ◽  
Film Drainage

Electrostatic Preclusion of Droplet Adhesion in a Microchannel

2015 ◽  
Author(s):  
Jonathan C. Hui ◽  
Peter Huang
Keyword(s):  
Thin Film ◽  
Surface Tension ◽  
Charged Droplet ◽  
Thin Film Lubrication ◽  
Threshold Pressure Gradient ◽  
Film Drainage ◽  
Lubrication Layer ◽  
Conduit Wall ◽  
Flow Blockage ◽  
Film Lubrication

In many multiphase fluidic processes, such as in petroleum extraction and biochemical analysis involving microscale conduits, the lodging of immiscible droplets often leads to disastrous flow blockage. Without a thin-film lubrication layer surrounding the adhered droplets, a significantly higher threshold pressure gradient is required to reinitiate bulk flows. In this work, we investigate the surface tension-driven thin-film drainage process that leads to droplet adhesion and study how electrostatic repulsion between a charged droplet interface and a charged conduit wall can prevent direct contact between the two. We report on our multiphysics computational results of an oversized gas droplet in a water-filled flow microchannel under the influence of surface tension and interfacial electrostatic forces.

Effects of Surface Roughness and Surface Force on the Thin Film Elastohydrodynamic Lubrication of Circular Contacts

2012 ◽  
Vol 67 (6-7) ◽  
pp. 412-418
Author(s):  
Li-Ming Chu ◽  
Jaw-Ren Lin ◽  
Jiann-Lin Chen
Keyword(s):  
Thin Film ◽  
Surface Roughness ◽  
Film Thickness ◽  
Contact Region ◽  
Load Condition ◽  
Elastohydrodynamic Lubrication ◽  
Surface Force ◽  
Surface Forces ◽  
Hertzian Contact ◽  
Deformation Equation

The effects of surface roughness and surface force on thin film elastohydrodynamic lubrication (TFEHL) circular contact problems are analyzed and discussed under constant load condition. The multi-level multi-integration (MLMI) algorithm and the Gauss-Seidel iterative method are used to simultaneously solve the average Reynolds type equation, surface force equations, the load balance equation, the rheology equations, and the elastic deformation equation. The simulation results reveal that the difference between the TFEHL model and the traditional EHL model increase with decreasing film thickness. The effects of surface forces become significant as the film thickness becomes thinner. The surface forces have obvious effects in the Hertzian contact region. The oscillation phenomena in pressure and film thickness come mainly from the action of solvation forces

Characteristic Times for Pressure and Electrostatic Force Driven Thin Film Drainage

2008 ◽  
Vol 5 (10) ◽  
pp. 2060-2066 ◽  
Author(s):  
David G. Crawford ◽  
Charles R. Koch ◽  
Subir Bhattacharjee
Keyword(s):  
Thin Film ◽  
Electrostatic Force ◽  
Film Drainage
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