Experiments

Inertial stretching separation in binary droplet collisions

Binary droplet collisions exhibit a wide range of outcomes, including coalescence and stretching separation, with a transition between these two outcomes arising for high Weber numbers and impact parameters. Our experimental study elucidates the …

Internal flows during droplet coalescence

*Invited talk:* QMUL Colloid & Interface Webinar

Substrate wettability affects mixing during droplet coalescence

73rd Annual APS DFD Meeting

Internal dynamics of coalescing droplets

Internal flows determine the extent of advective mixing (stretching and folding of fluid interfaces) between coalescing droplets, effectively defining the initial condition for molecular diffusion to homogenise the fluid. Efficient mixing is …

Substrate wettability influences internal jet formation and mixing during droplet coalescence

The internal dynamics during the axisymmetric coalescence of an initially static free droplet and a sessile droplet of the same fluid are studied using both laboratory experiments and numerical simulations. A high-speed camera captured internal flows …

Surface jets and internal mixing during the coalescence of impacting and sessile droplets

The internal dynamics during the coalescence of a sessile droplet and a subsequently deposited impacting droplet, with either identical or distinct surface tension, is studied experimentally in the regime where surface tension is dominant. Two color …

Mixing within impacting and coalescing droplets of different surface tension

UKFN Drop Dynamics SIG Meeting: January 2020

Internal flows in impacting and coalescing droplets of different surface tension

72nd Annual APS DFD Meeting

Mixing within impacting and coalescing droplets of different surface tension

Droplets 2019 (**Best Poster Prize for Day 2**)

Mixing within impacting and coalescing droplets of different surface tension

Droplets 2019 Satellite Meeting, organised by the UKFN Drops on Smart Surfaces SIG