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Research projects

Laser impact on a drop

Dyed water drop hit by a pulsed laser.
When a liquid drop is hit by a strong laser pulse it shows a violent response: the drop is propelled forward at high speed, strongly deforms eventually fragments into tiny droplets. In this project, we analyse this drop deformation and subsequent fragmentation in terms of the laser-pulse properties and drop characteristics. We employ experimental methods as well as theoretical and numerical modelling. For a video illustrating our work, click here.
Collaborators: Alexander Klein, Sten Reijers, Henri Lhuissier & Emmanuel Villermaux (Aix-Marseille University), Federico Toschi (Eindhoven University), Ronnie Hoekstra, Wim Ubachs, Dmitry Kurilovich & Oscar Versolato (ARCNL), Jacco Snoeijer & Detlef Lohse (UTwente)

Drop impact and spreading

   Frozen splat of a hot liquid tin drop
impacting a cold sapphire substrate.
Drop impact on a hard substrate can result in (undesired) splashing and fragmentation. When a hot liquid metal impacts a cold substrate it solidifies during this process. Solidification during impact strongly affects the subsequent spreading and splashing of a droplet, which we quantify by combining side- and bottomview imaging with theoretical analysis.
Collaborators: Marise Gielen, Riëlle de Ruiter (ASML), Michel Riepen (ASML), Robin Koldewij, Jacco Snoeijer & Detlef Lohse (UTwente)

Evaporation of 'living liquid' drops

Tea stain on a desk.
When a suspension drop evaporates, it leaves behind a drying stain. Examples of these drying stains encountered in daily life are coffee or tea stains on a table top. What happens to these stains when the particles are alive? We investigate how patterns form in evaporating drops that contain living bacteria, and how to control these patterns.
Collaborators: Alvaro Gomez Marin (UTwente), Federico Toschi (Eindhoven)

Team members

Current
Sten Reijers (PhD student)

Former
Marise Gielen (PhD student 2013-2018)
Alexander Klein (PhD student 2013-2017)
Riëlle de Ruiter (Postdoc 2015-2016)
Bo Liu (MSc student 2016-2017)
Koen Arens (MSc student 2015-2016)
Sten Reijers (MSc student 2014-2015)