Numerical Simulation of Electroosmotic Flow

Neelesh A. Patankar, Howard H. Hu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

501 Scopus citations


We have developed a numerical scheme to simulate electroosmotic flows in complicated geometries. We studied the electroosmotic injection characteristics of a cross-channel device for capillary electrophoresis. We found that the desired rectangular shape of the sample plug at the intersection of the cross-channel can be obtained when the injection is carried out at high electric field intensities. The shape of the sample plug can also be controlled by applying an electric potential or a pressure at the side reservoirs. Flow induced from the side channels into the injection channel squeezes the streamlines at the intersection, thus giving a less distorted sample plug. Results of our simulations agree qualitatively with experimental observations.

Original languageEnglish (US)
Pages (from-to)1870-1881
Number of pages12
JournalAnalytical Chemistry
Issue number9
StatePublished - May 1 1998

ASJC Scopus subject areas

  • Analytical Chemistry


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