electroosmosis – Page 2 – TechConnect Briefs

Electroosmotic Flow and Zone Broadening in Microfluidic Channels of Variable Cross-Section and Wall Charge

Ghosal S., Lu Z., Northwestern University, US

Electroosmotic flow is often the method of choice for generating fluid flows in micro fluidic devices. The resulting flow has a characteristic at profile which has the advantage of very low axial dispersion. This is [...]

Inverted Method for Simulation of Electrokinetic Transport in Microchannel Devices

Nilson R.H., Griffiths S.K., Sandia National Laboratories, US

An inverted method of solution is used to numerically solve the equations governing electrokinetic fluid flow and species transport in microscale turns, junctions and curved channels. Rather than solving for the electric potential and fluid [...]

Electroosmotic Microfluidic Flows with Random Zeta Potential

Gleeson J.P., University College Cork, IR

Average electroosmotic ows in the presence of axially-varying zeta potentials are shown to be plug-like, with variances which depend on radial position across the capillary. Consequences for the dispersion of samples are examined theoretically and [...]

Analysis of Sample Injection and Band-Broadening in Capillary Electrophoresis Microchips

Krishnamoorthy S., Giridharan M.G., CFD Research Corporation, US

An implicit finite-volume numerical scheme has been developed to solve the three-dimensional transport equations that govern the electroosmotic and electrophoretic phenomena. The scheme consists of solving the ion transport equation and electro-neutrality condition coupled with [...]

Computer Simulations of Electrokinetic Mass Transport in Microfabricated Fluidic Devices

Ermakov S.V., Jacobson S.C., Ramsey J.M., Oak Ridge National Laboratory, US

A mathematical model and computer code for simulat-ing electrokinetic fluid and sample manipulations in micro-fabricated fluidic devices (microchips) are described. The model accounts for mass transport mechanisms such as electrophoretic migration, bulk fluid motion due [...]

Simulation of Electroosmosis Using a Meshless Finite Point Method

Mitchell M.J., Aluru N.R., University of Illinois, US

A Finite Point Method (FPM) based on a weighted least squares interpolation is presented for the simulation of electroosmotic transport in capillaries. This method requires no mesh and involves no Galerkin-type integration, making it more [...]