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Investigation of combined electro-osmotic and pressure-driven flow in rough microchannels

DSpace at IIT Bombay

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Title Investigation of combined electro-osmotic and pressure-driven flow in rough microchannels
 
Creator WAGHMARE, PR
MITRA, SK
 
Subject numerical-simulation
electro-osmotic flow
microchannel
surface roughness
 
Description The present study is carried out to investigate the influence of surface roughness in combined electro-osmotic and pressure-driven flow in microchannel. Two-dimensional theoretical model is developed to predict the behavior of velocity profiles in rough microchannel. The concept of surface roughness-viscosity model is used to account the effect of surface roughness. The pluglike velocity profile for electro-osmotic flow and the parabolic velocity profile for pressure-driven flow with delay in attaining the centerline velocity are observed. It is found that for electro-osmotic flow, the deviation in velocity profile from a flow in a smooth channel occurs near the wall, whereas in pressure-driven flow, such deviation is dominant in the core region. A superposition of pluglike and parabolic velocity profiles is found in combined electro-osmotic and pressure-driven flow. It is also observed that in the case of combined flow, the deviation in velocity profile from the smooth channel case reduces gradually with the distance from the wall.
 
Publisher ASME-AMER SOC MECHANICAL ENG
 
Date 2011-07-18T18:03:12Z
2011-12-26T12:50:45Z
2011-12-27T05:36:48Z
2011-07-18T18:03:12Z
2011-12-26T12:50:45Z
2011-12-27T05:36:48Z
2008
 
Type Article
 
Identifier JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 130(6), -
0098-2202
http://dx.doi.org/10.1115/1.2928333
http://dspace.library.iitb.ac.in/xmlui/handle/10054/5008
http://hdl.handle.net/10054/5008
 
Language en