RESEARCH PAPERS: Electrical Effects at the Macro and Micro Scale

Optimization of High Flow Rate Nanoporous Electroosmotic Pump

[+] Author and Article Information
Y. Berrouche, Y. Avenas, C. Schaeffer

 Grenoble Institute of Technology, 38402 Saint-Martin-d’Hères Cedex, Grenoble, Isère 38402, France

P. Wang, H.-C. Chang

 University of Notre Dame, Notre Dame, IN 46556

J. Fluids Eng 130(8), 081604 (Jul 31, 2008) (7 pages) doi:10.1115/1.2956609 History: Received July 16, 2007; Revised December 17, 2007; Published July 31, 2008

We present a theory for optimizing the thermodynamic efficiency of an electroosmotic (EO) pump with a large surface area highly charged nanoporous silica disk substrate. It was found that the optimum thermodynamic efficiency depends on the temperature, the silica zeta potential, the viscosity, the permittivity, the ion valency, the tortuosity of the nanoporous silica but mainly the effective normalized pore radius of the substrate scaled with respect to the Debye length. Using de-ionized water as the pumping liquid, the optimized EO pump generates a maximum flow rate of 13.6mlmin at a pressure of 2kPa under an applied voltage of 150V. The power consumed by the pump is less than 0. 4W. The EO pump was designed to eliminate any bubble in the hydraulic circuit such that the pump can be operated continuously without significant degradation in the performance.

Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 12

The variation of the thermodynamic efficiency for various normalized pore radius

Grahic Jump Location
Figure 9

Measurement setup

Grahic Jump Location
Figure 10

Performance curves for the EO pump showing max flow rate versus max pumping pressure for different operating voltages. The pumping liquid is DI water.

Grahic Jump Location
Figure 11

Q-P diagram for EK pumps

Grahic Jump Location
Figure 1

Structure of EDL

Grahic Jump Location
Figure 2

The EO pumping in a capillary

Grahic Jump Location
Figure 3

The velocity profile u(r) in a capillary of radius a for different values of the pressure drop (ΔP=ΔP1, ΔP=ΔP1∕2, and ΔP=ΔP1∕5, ΔP1 are the given pressure drops less than ΔPm).

Grahic Jump Location
Figure 4

The variation of the normalized inner potential profile for different values of the Debye length.

Grahic Jump Location
Figure 5

Influence of the valance number (a), and the Zeta potential (b) on the optimum thermodynamic efficiency for an effective normalized pore radius of 4.

Grahic Jump Location
Figure 6

The variation of the optimum efficiency in function of the normalized pore radius aeff*

Grahic Jump Location
Figure 7

The Schematic of the porous EO pump

Grahic Jump Location
Figure 8

The design of the porous EO pump



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In