Michiel A. Hack
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View article: Ring-shaped colloidal patterns on saline water films
Ring-shaped colloidal patterns on saline water films Open
We reveal that a spreading colloidal drop evolves into a ring-shaped pattern after it is deposited on a thin saline water film. Clustered colloidal particles aggregate into larger trapezoidally-shaped 'supraclusters'. Using a simple model …
View article: Drawing liquid bridges from a thin viscous film
Drawing liquid bridges from a thin viscous film Open
A particle is trapped by the capillary forces in the meniscus after being brought into contact with a liquid film. We experimentally show that these capillary forces are time-dependent, highlighting the importance of dynamics on adhesion.
View article: Rapid viscoelastic spreading
Rapid viscoelastic spreading Open
We investigate the rapid spreading dynamics of a viscoelastic drop on a solid. Upon contact, surface tension drives a fast motion of the contact line along the substrate. Here we resolve this motion for viscoelastic liquids by experiments …
View article: Rapid Viscoelastic Spreading
Rapid Viscoelastic Spreading Open
We investigate the rapid spreading dynamics of a viscoelastic drop on a solid. Upon contact, surface tension drives a fast motion of the contact line along the substrate. Here, we resolve this motion for viscoelastic liquids by experiments…
View article: When Elasticity Affects Drop Coalescence
When Elasticity Affects Drop Coalescence Open
The breakup and coalescence of drops are elementary topological transitions in interfacial flows. The breakup of a drop changes dramatically when polymers are added to the fluid. With the strong elongation of the polymers during the proces…
View article: Theory for the coalescence of viscous lenses
Theory for the coalescence of viscous lenses Open
Drop coalescence occurs through the rapid growth of a liquid bridge that connects the two drops. At early times after contact, the bridge dynamics is typically self-similar, with details depending on the geometry and viscosity of the liqui…
View article: Asymmetric coalescence of two droplets with different surface tensions is caused by capillary waves
Asymmetric coalescence of two droplets with different surface tensions is caused by capillary waves Open
When two droplets with different surface tensions collide, the shape evolution of the merging droplets is asymmetric. Using experimental and numerical techniques, we reveal that this asymmetry is caused by asymmetric capillary waves, which…
View article: Wetting and coalescence: beyond single-phase flows
Wetting and coalescence: beyond single-phase flows Open
Multi-phase wetting and coalescence are ubiquitous in nature and technology alike. In particular, a good understanding of wetting and coalescence is crucial for the successful application of inkjet printing technology and for its future de…
View article: Wetting of Two-Component Drops: Marangoni Contraction\nVersus Autophobing
Wetting of Two-Component Drops: Marangoni Contraction\nVersus Autophobing Open
The wetting properties\nof multicomponent liquids are crucial to\nnumerous industrial applications. The mechanisms that determine the\ncontact angles for such liquids remain poorly understood, with many\nintricacies arising due to complex …
View article: Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing
Wetting of Two-Component Drops: Marangoni Contraction Versus Autophobing Open
The wetting properties of multi-component liquids are crucial to numerous industrial applications. The mechanisms that determine the contact angles for such liquids remain poorly understood, with many intricacies arising due to complex phy…
View article: Self-Similar Liquid Lens Coalescence
Self-Similar Liquid Lens Coalescence Open
A basic feature of liquid drops is that they can merge upon contact to form a larger drop. In spite of its importance to various applications, drop coalescence on prewetted substrates has received little attention. Here, we experimentally …
View article: Printing wet-on-wet: Attraction and repulsion of drops on a viscous film
Printing wet-on-wet: Attraction and repulsion of drops on a viscous film Open
Wet-on-wet printing is frequently used in inkjet printing for graphical and industrial applications, where substrates can be coated with a thin liquid film prior to ink drop deposition. Two drops placed close together are expected to inter…
View article: Printing wet-on-wet: attraction and repulsion of drops on a viscous film
Printing wet-on-wet: attraction and repulsion of drops on a viscous film Open
Wet-on-wet printing is frequently used in inkjet printing for graphical and industrial applications, where substrates can be coated with a thin liquid film prior to ink drop deposition. Two drops placed close together are expected to inter…
View article: Liquid dewetting under a thin elastic film
Liquid dewetting under a thin elastic film Open
We study the dewetting of liquid films capped by a thin elastomeric layer. When the tension in the elastomer is isotropic, circular holes grow at a rate which decreases with increasing tension. The morphology of holes and rim stability can…