Drop-on-demand electrohydrodynamic printing of nematic liquid crystals

Electrohydrodynamic (EHD) printing of nematic liquid crystals (LCs) is demonstrated. Miniscule LC droplets, as small as 1 micron, are generated with the EHD printing system and deposited with high precision onto a glass substrate. Herein, we show how …

Effect of surfactants on the splashing dynamics of drops impacting smooth substrates

We present the results of a systematic study elucidating the role that dynamic surface tension has on the spreading and splashing dynamics of surfactant-laden droplets during the impact on hydrophobic substrates. Using four different surfactants at …

Droplet impact on liquid pools

*Invited talk:* LIFD 5th Birthday Celebration Event

Droplet splashing on dry and wet surfaces

*Invited talk:* Leibniz Institute for Polymer Research Colloquium

Simulation of bidisperse colloidal centrifugal sedimentation using a mixture viscosity model

Understanding the sedimentation behavior of bidisperse colloidal suspensions is critical in determining their stability and separation. While centrifugation is often used to accelerate separation, the settling of bidisperse colloids and their phase …

High-speed drop impact onto moving pools: ejecta sheets and splashing

76th Annual APS DFD Meeting (Session ZC20.1 -- 12:50 Tuesday)

Droplet impact dynamics on shallow pools

When a fast droplet impacts a pool of the same fluid, a thin ejecta sheet that dominates the early-time dynamics emerges within the first few microseconds. Fluid and impact properties are known to affect its evolution; we experimentally reveal that …

On-demand pitch tuning of printed chiral nematic liquid crystal droplets

Identifying facile means with which to tune the pitch of, and therefore the reflected colour from, chiral nematic liquid crystals (CLC) is of interest for many different photonics applications including optical filters, coloured displays, and …

Enhancing and visualising mixing between impacting droplets

APS March Meeting 2023 (Session Q18.1 -- 15:00 Wednesday)

Droplet impact dynamics on shallow pools

75th Annual APS DFD Meeting (Session T12.6 -- 17:15 Monday)