Time periodic electro-osmotic flow through a microannulus

2010 ◽  
Vol 22 (4) ◽  
pp. 042001 ◽  
Author(s):  
Yongjun Jian ◽  
Liangui Yang ◽  
Quansheng Liu
Keyword(s):  
Osmotic Flow ◽  
Flow Through ◽  
Time Periodic ◽  
Electro Osmotic Flow

Time-Periodic Electro-Osmotic Flow With Nonuniform Surface Charges

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Hyunsung Kim ◽  
Aminul Islam Khan ◽  
Prashanta Dutta
Keyword(s):  
Zeta Potential ◽  
Analytical Model ◽  
Potential Distribution ◽  
Step Change ◽  
Creeping Flow ◽  
Function Technique ◽  
Osmotic Flow ◽  
Nonuniform Surface ◽  
Time Periodic ◽  
Electro Osmotic Flow

Mixing in a microfluidic device is a major challenge due to creeping flow, which is a significant roadblock for development of lab-on-a-chip device. In this study, an analytical model is presented to study the fluid flow behavior in a microfluidic mixer using time-periodic electro-osmotic flow. To facilitate mixing through microvortices, nonuniform surface charge condition is considered. A generalized analytical solution is obtained for the time-periodic electro-osmotic flow using a stream function technique. The electro-osmotic body force term is accounted as a slip boundary condition on the channel wall, which is a function of time and space. To demonstrate the applicability of the analytical model, two different surface conditions are considered: sinusoidal and step change in zeta potential along the channel surface. Depending on the zeta potential distribution, we obtained diverse flow patterns and vortices. The flow circulation and its structures depend on channel size, charge distribution, and the applied electric field frequency. Our results indicate that the sinusoidal zeta potential distribution provides elliptical shaped vortices, whereas the step change zeta potential provides rectangular shaped vortices. This analytical model is expected to aid in the effective micromixer design.

ALTERATION IN ELECTRO-OSMOTIC FLOW THROUGH A NON-DARCY POROUS MEDIUM DUE TO MHD AND PERISTALTIC PUMPING

2019 ◽  
Vol 22 (13) ◽  
pp. 1639-1650
Author(s):  
Saima Noreen ◽  
Qurat-ul-Ain ◽  
Muhammad Qasim ◽  
Dharmendra Tripathi
Keyword(s):  
Porous Medium ◽  
Osmotic Flow ◽  
Peristaltic Pumping ◽  
Flow Through ◽  
Electro Osmotic Flow

Time Periodic Electro-Osmotic-Flow of Jeffrey Fluid in a Circular Microtube

2011 ◽  
Author(s):  
Y. J. Jian ◽  
Q. S. Liu ◽  
H. Z. Duan ◽  
L. Chang ◽  
L. G. Yang ◽  
...  
Keyword(s):  
Jeffrey Fluid ◽  
Osmotic Flow ◽  
Time Periodic ◽  
Electro Osmotic Flow

scholarly journals Electro-osmotic flow through nanopores in thin and ultrathin membranes

2017 ◽  
Vol 95 (6) ◽  
Author(s):  
Dmitriy V. Melnikov ◽  
Zachery K. Hulings ◽  
Maria E. Gracheva
Keyword(s):  
Osmotic Flow ◽  
Flow Through ◽  
Electro Osmotic Flow ◽  
Ultrathin Membranes
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