Droplet velocities of several centimetres per second are observed in electrowetting microchannels, which is nearly two orders of magnitude higher than the velocities demonstrated by some other electrofluidic actuation principles.
Because of the difficulties inherent in these micro-scale experiments, numerical simulations are useful in predicting the behaviour of droplets under electrowetting actuation.
In this paper we investigate the effect of electrode size, channel height, and voltage variations on droplet actuation.
For the numerical analysis, the effects of gaps between electrodes are assumed to be negligible; hence the actuation will be continuous.
Winner of Design News magazine's 1998 Best New Electronic Product of the Year award, the PushGate technology solves the issues of collapsing domes, teasing problems, early failure and inconsistent actuation
force which have long plagued conventional tactile membrane switches.
In laboratory tests that began more than a year ago, the DuraSwitch PushGate has far exceeded the performance of tactile pushbutton switches, which can fail anywhere between 0 and 100,000 actuations.
Internet users may track the DuraSwitch PushGate's performance in real time by viewing an actuation counter on the DuraSwitch Web site at www.