A numerical model for ion-drag electrohydrodynamic (EHD) micropumps has been developed. The Poisson and charge conservation equations are solved to determine the electric body force within the flow domain. The charge distribution at the electrodes is assumed to depend on the magnitude and the gradient of the electric field at the surface of the electrode. The flow field is then determined by solving the momentum equation with the inclusion of the electric body force. Simulations were performed for micropump configurations that consisted of a series of planar electrode pairs embedded along the bottom wall of a microchannel. A two-dimensional segment of the channel with a single electrode pair is simulated using periodic boundary conditions at the inlet and outlet for the charge and electric fields. An empirical model was developed to estimate the charge boundary condition for the simulations. The simulation results were in good agreement with existing experimental data. The model was then used to perform a parametric study of the effect of channel height on the pump performance.
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On the Modeling and Simulation of Ion Drag Electrohydrodynamic Micropumps
S. Mohammed Hasnain
,
S. Mohammed Hasnain
Department of Mechanical Engineering McMaster University
Hamilton, ON, Canada
, L8S 4L7
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Akhilesh Bakshi
,
Akhilesh Bakshi
Department of Mechanical Engineering McMaster University
Hamilton, ON, Canada
, L8S 4L7
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P. Ravi Selvaganapathy
,
P. Ravi Selvaganapathy
Department of Mechanical Engineering McMaster University
Hamilton, ON, Canada
, L8S 4L7
Search for other works by this author on:
Chan Y. Ching
chingcy@mcmaster.ca
Chan Y. Ching
Department of Mechanical Engineering McMaster University
Hamilton, ON, Canada
, L8S 4L7
Search for other works by this author on:
S. Mohammed Hasnain
Department of Mechanical Engineering McMaster University
Hamilton, ON, Canada
, L8S 4L7
Akhilesh Bakshi
Department of Mechanical Engineering McMaster University
Hamilton, ON, Canada
, L8S 4L7
P. Ravi Selvaganapathy
Department of Mechanical Engineering McMaster University
Hamilton, ON, Canada
, L8S 4L7
Chan Y. Ching
Department of Mechanical Engineering McMaster University
Hamilton, ON, Canada
, L8S 4L7chingcy@mcmaster.ca
J. Fluids Eng. May 2011, 133(5): 051102 (7 pages)
Published Online: May 31, 2011
Article history
Received:
August 19, 2010
Revised:
April 12, 2011
Online:
May 31, 2011
Published:
May 31, 2011
Citation
Mohammed Hasnain, S., Bakshi, A., Ravi Selvaganapathy, P., and Ching, C. Y. (May 31, 2011). "On the Modeling and Simulation of Ion Drag Electrohydrodynamic Micropumps." ASME. J. Fluids Eng. May 2011; 133(5): 051102. https://doi.org/10.1115/1.4004024
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