Direct Observation of Trapped Gas Bubbles by Capillarity in Sandy Porous Media

2009 ◽  
Vol 82 (1) ◽  
pp. 111-122 ◽  
Author(s):  
Tetsuya Suekane ◽  
Na Zhou ◽  
Takahiro Hosokawa ◽  
Takuya Matsumoto
Keyword(s):  
Porous Media ◽  
Direct Observation ◽  
Gas Bubbles ◽  
Trapped Gas

Dynamic Characterization of a Valveless Micropump Considering Entrapped Gas Bubbles

2013 ◽  
Vol 135 (9) ◽  
Author(s):  
Songjing Li ◽  
Jixiao Liu ◽  
Dan Jiang
Keyword(s):  
Numerical Simulation ◽  
Theoretical Model ◽  
Experimental Studies ◽  
Gas Bubbles ◽  
Chamber Pressure ◽  
Dynamic Characterization ◽  
Valveless Micropump ◽  
Performance Deterioration ◽  
Trapped Gas

Unexpected gas bubbles in microfluidic devices always bring the problems of clogging, performance deterioration, and even device functional failure. For this reason, the aim of this paper is to study the characterization variation of a valveless micropump under different existence conditions of gas bubbles based on a theoretical modeling, numerical simulation, and experiment. In the theoretical model, we couple the vibration of piezoelectric diaphragm, the pressure drop of the nozzle/diffuser and the compressibility of working liquid when gas bubbles are entrapped. To validate the theoretical model, numerical simulation and experimental studies are carried out to investigate the variation of the pump chamber pressure influenced by the gas bubbles. Based on the numerical simulation and the experimental data, the outlet flow rates of the micropump with different size of trapped gas bubbles are calculated and compared, which suggests the influence of the gas bubbles on the dynamic characterization of the valveless micropump.

Direct Observation of Fluid Mass Transfer Resistance in Porous Media by NMR Spectroscopy

1998 ◽  
Vol 37 (13-14) ◽  
pp. 1882-1885 ◽  
Author(s):  
Ulrich Tallarek ◽  
Dagmar van Dusschoten ◽  
Henk Van As ◽  
Georges Guiochon ◽  
Ernst Bayer
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Nmr Spectroscopy ◽  
Direct Observation ◽  
Mass Transfer Resistance ◽  
Transfer Resistance ◽  
Fluid Mass

Direct Observation of Al Drop and Gas Bubbles in the Anode-Cathode Space during Aluminum Electrolysis

2012 ◽  
pp. 875-881 ◽  
Author(s):  
Jilai Xue ◽  
Yifang Zheng ◽  
Jun Zhu ◽  
Xiang Li ◽  
Lin Li
Keyword(s):  
Direct Observation ◽  
Gas Bubbles ◽  
Aluminum Electrolysis

Bistatic acoustic scattering from trapped gas bubbles in sandy sediments

1994 ◽  
Vol 96 (5) ◽  
pp. 3219-3219
Author(s):  
Frank A. Boyle ◽  
Nicholas P. Chotiros
Keyword(s):  
Acoustic Scattering ◽  
Gas Bubbles ◽  
Trapped Gas ◽  
Sandy Sediments

THE ELIMINATION OF TRAPPED GAS FROM POROUS MEDIA BY DIFFUSION

Soil Science ◽  
1973 ◽  
Vol 116 (1) ◽  
pp. 18-25 ◽  
Author(s):  
D. B. McWHORTER ◽  
A. T. COREY ◽  
K. M. ADAM
Keyword(s):  
Porous Media ◽  
Trapped Gas

Development and Testing of a Kinetic Model for Oxygen Transport in Porous Media in the Presence of Trapped Gas

Ground Water ◽  
1997 ◽  
Vol 35 (2) ◽  
pp. 270-279 ◽  
Author(s):  
J. H. Donaldson ◽  
J. D. Istok ◽  
M. D. Humphrey ◽  
K. T. O'Reilly ◽  
C. A. Hawelka ◽  
...  
Keyword(s):  
Porous Media ◽  
Kinetic Model ◽  
Oxygen Transport ◽  
Transport In Porous Media ◽  
Trapped Gas

Slow viscous flow near a superhydrophobic surface with trapped gas bubbles

PAMM ◽  
2017 ◽  
Vol 17 (1) ◽  
pp. 651-652
Author(s):  
Aleksei Ageev ◽  
Irina Golubkina ◽  
Alexander Osiptsov
Keyword(s):  
Viscous Flow ◽  
Superhydrophobic Surface ◽  
Gas Bubbles ◽  
Slow Viscous Flow ◽  
Trapped Gas
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