Route towards droplet formation in laminar separated liquid/liquid flows: analysis and large-scale DNS

Speaker: Dr Lennon Ó'Náraigh, UCD

Time: 3.00PM

Date: Wednesday 8 October 2014, 3:00 PM

Location: Room H1.52, UCD Science Hub, University College Dublin,

Abstract:

We study two-phase liquid-liquid systems where the interface is linearly unstable to small-amplitude perturbations. Although no Squire's theorem exists for the present system, linear theory shows that the most-dangerous modes are typically two-dimensional, and that three-dimensional wavy interfaces are extremely difficult (and often impossible) to realise. Nevertheless, real interfaces do exhibit three-dimensional waves, since otherwise ligaments and droplets would never occur. Using weakly nonlinear theory and large-scale direct numerical simulation, we explain this paradox.

Tea/coffee will be provided.

Series: Applied and Computational Mathematics Seminar Series

Please Note: All are welcome and tea/coffee will be provided