Hydrodynamics of Vibrated Liquid Drops
The response of a liquid drop to an external vibration is remarkable rich and sometimes surprisingly non-trivial. If a millimeter-sized drop is supported by a vertically vibrated solid plate, it’s shape changes in a number of peculiar ways, depending on the parameters of the vibration. We develop a minimal hydrodynamic model to study the so-called worm-like instability of a drop that leads to its significant horizontal elongation, resulting in the formation of a complex twisting structure that oscillates at half of the driving frequency. In a different set up, we consider a heavy liquid drop on a lighter carrier fluid film. Without vibration a heavy drop falls through the carrier film by forming a stretching liquid column until the bottom tip of the column reaches the solid plate and the carrier film ruptures. We show that vertical vibration can prevent the uncontrollable sinking of the drop through the carrier fluid."
- 2005: PhD in theoretical physics, Brandenburg University of Technology, Cottbus, Germany
- 2006-2010: Research Associate, Oxford University and Loughborough University, UK
- 2010-2013: Lecturer in Applied Mathematics, University of Cape Town, South Africa
- Since 2013: Senior Lecturer, Swinburne University of Technology.