Picoliter droplets actuated on an electrowetting-on-dielectric (EWD) actuator are demonstrated. In this study, the physical scaling of electrodes for 33 μm and 21 μm EWD devices resulted in droplets of 12 pl and 5 pl being dispensed respectively in conjunction with 3 μm SU8 gaskets. The stacked multi-layer insulators in the actuators consisted of 200 nm tantalum pentoxide (Ta2O5) and 200 nm par...

Here we review and extend models on different scales for a computing architecture made from networks of excitable chemical droplets. The model system of the Belousov-Zhabotinsky (BZ) reaction enclosed in lipid-coated droplets in oil is used to study signal transmission dynamics of chemical computers and their modelling. The excitable medium oscillates in the sub-excitable, excitable or self-exc...

When the mass constraint of the Cahn-Hilliard equation in two dimensions is lowered to the order of ǫ, where ǫ is the interface thickness parameter, the existence of droplet solutions becomes conditional. For interior single droplet solutions, there is a critical value for the mass constraint such that above this value two interior single droplet solutions exist, and below this value interior s...

For a multi-component hydrocarbon mixture under supercritical conditions, the mechanism and criterion for transition of dominant mixing mode from evaporation to diffusion are not well established. In this paper, phase processes three-component fuel (5.3 wt% isooctane, 25.8 n-dodecane 68.9 n-hexadecane) droplets in sub- nitrogen environments were studied using molecular dynamics, comparison with...

Spray flows are typically highly unsteady, three-dimensional and often densely saturated with droplets that impact other droplets, coalesce and breakup. Droplets, fluid ligaments and bags can form from fluid streams and sheets being accelerated in air cross flows or along solid surfaces. This work shows the potential for imaging these complex features with novel three-dimensional imaging method...