surface tension – Page 2 – TechConnect Briefs

Electrode Shapes for Electrowetting Arrays

Lienemann J., Greiner A., Korvink J.G., Albert Ludwig University, DE

We calculate the potential energy of an electrowetting array for different shapes and sizes of interdigital edge structures. To understand the dynamic effects at the beginning of the droplet motion is crucial for the optimization [...]

Capillary Interaction Between a Small Thin Solid Plate and a Liquid

Taher M., Saif T., University of Illinois Urbana-Champaign, US

Micromechanical systems are increasingly being used in micro fluidic and biological applications where solid-liquid interaction phenomena become important. Here, we present an analytical/computational study on the interaction force between a thin solid plate interfacing with [...]

Transient Filling Flow into Microchannels Considering Surface Tension

Kim D.S., Lee K-C, Lee S.S., Kwon T.H., Lee K-C, Lee S.S., Pohang University of Science and Technology, KR

In this paper, we investigated, both experimentally and numerically, transient “filling” flow into microchannels, which differs from completely “filled” flow in micro-channels. An experimental flow visualization system was devised to observe the characteristics of microchannel [...]

Novel Microfluidic Jet Deflection: Significant Modeling Challenge with Great Application Potential

Delametter C.N., Trauernicht D.P., Chwalek J.M., Eastman Kodak Company, US

A novel method is described for deflecting a liquid jet emanating from an orifice having a diameter of approximately ten microns. While awkward mechanical valves or unwieldy electrodes can be used to deflect a jet, [...]

A Passive Fluid Valve Element for a High-Density Chemical Synthesis Machine

Moroney R.M., Amantea R., McBride S.E., Sarnoff Corporation, US

We have developed a passive valve element for use in a high-density chemical synthesis machine. The element stops fluid flow by the surface tension forces occurring at small channel openings. The openings are circular holes [...]