Virtual microfluidics channels can be digitally defined and changed using electrowetting effect (EWOD). Shown on OpenDrop how to fill digitally defined channels using a micropipette or by a piston pump. The formation of the programmable microchannels and their geometries are defined through a computer control software. Flow channels can be dynamically linked or single droplets separated from a flow of liquid.

For this tests special cartridges with drilled top cover glass and four tube adapters were made.

Programmable Electrowetting Channels were earlier proposed in the following papers:

Reconfigurable virtual electrowetting channels

Virtual electrowetting channels: electronic liquid transport with continuous
channel functionality