Electrokinetic Transport of Microparticles in the Microfluidic Enclosure Domain

2013 ◽  
pp. 319-326
Author(s):  
Qian Liang ◽  
Chun Yang ◽  
Jianmin Miao
Keyword(s):  
Electrokinetic Transport

Effect of Charge Distribution at the Three Phase Contact Line for an Electrolyte Drop

2013 ◽  
Author(s):  
Dibyo Sarkar ◽  
Siddhartha Das ◽  
Sushanta K. Mitra
Keyword(s):  
Velocity Field ◽  
Electrolyte Solution ◽  
Contact Line ◽  
Electric Double Layer ◽  
Charged Surface ◽  
Electrokinetic Transport ◽  
Phase Contact ◽  
Advective Flux ◽  
Three Phase ◽  
First Time

In this paper, we obtain the velocity field in a wedge in a Three Phase Contact Line (TPCL) in an electrolyte drop which is evaporating on a charged solid. Combination of an electrolyte solution and the charged surface leads to the formation of an Electric Double Layer (EDL), which in presence of the evaporation-triggered pressure-driven transport, leads to the generation of a streaming current that causes an electrokinetic transport. Hence, we analyze for the first time an electrokinetic transport in a charged wedge in presence of an evaporation-induced advective flux. Our results exhibit flow patterns that are distinctly different as compared to that of the case where there is no such electrokinetic transport and the problem is merely that of evaporation in a wedge.

Transport Mechanisms in Electrokinetic Nanoscale Channels

2004 ◽  
Author(s):  
Sumita Pennathur ◽  
Juan G. Santiago
Keyword(s):  
Field Theory ◽  
Parametric Study ◽  
Nanometer Scale ◽  
Transport Mechanisms ◽  
Electrokinetic Transport ◽  
Zeta Potentials ◽  
Numerical Studies ◽  
Debye Layer ◽  
Model Predictions ◽  
Shape And Size

We investigate electrokinetic transport in nanometer-scale fluidic channels. Our study includes numerical studies of nanofluidic transport of both charged and uncharged analytes in conditions of finite Debye layer thickness and high zeta potentials. The models are based on continuum mass transport and field theory. We also perform an experimental parametric study using etched nanoscale channels. Experimental results agree with model predictions and show that bulk electrokinetic transport in nanoscale channels depends strongly on the shape and size of the EDL and on the effects of transverse electrophoretic migration.

scholarly journals Electrokinetic Transport in Microchannels with Random Roughness

2009 ◽  
Vol 81 (8) ◽  
pp. 2953-2961 ◽  
Author(s):  
Moran Wang ◽  
Qinjun Kang
Keyword(s):  
Electrokinetic Transport ◽  
Random Roughness
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