We have an image processing capability to investigate different droplet dynamics; spreading, coalescence, drop-impact, etc. "Engineering Beyond, a collaborator of iSSELab, had developed this customized commercial image processing algorithm that is being used for numerous applications in industries.
The role of medium viscosity on a non-deformable rolling body has long been understood while its deformable counterpart still awaits clarification. In this article, we present a scaling analysis with experimental evidences to demonstrate that in creeping flow, medium viscosity significantly alters how the descent speed of a drop responds to an increase in drop size. While descending down an incline in a viscous medium, a rolling drop may travel with either increasing or decreasing velocities as its size increases. The boundary between these two motion behaviors can be maneuvered by altering the viscosity of the surrounding medium.
Droplet Deposition Techniques
Droplet Spreading - Liquid-Fluid Interface
We studied the early time dynamics of viscous drop spreading on a liquid–fluid interface. Unlike spreading on solid substrate, a drop deforms at the base as it spreads on a liquid–fluid interface. Hence the dynamics are seen to deviate from the classical power law of spreading. Experimental observations allowed us to establish a simple empirical expression to predict the temporal growth of the contact radius. Further, inertial oscillations were observed for spreading of less viscous liquid drop that can be described by the inertial capillarity model.