KRÜSS Surface Science Hub
interfacial Science and Surface Engineering Lab
Droplet freezing and (de) icing
We present the evidence of universality in conical tip formation during the freezing of arbitrary-shaped sessile droplets.
We present the evidence of universality in conical tip formationduring the freezing of arbitrary-shaped sessile droplets. The focus is to demonstrate the relationship between this universality and the liquid drop shape. We observe that, in the case of asymmetric drops, this universal shape is achieved when the tip reconfigures by changing its location, which subsequently alters the frozen drop shape. The proposed “two-triangle” model quantifies the change in the tip configuration as a function of the asymmetry of the drop that shows a good agreement with the experimental evidence. Finally, based on the experimental and theoretical exercise, we propose the scaling dependence between the variations in the tip configuration and the asymmetry of the drop.
Foaming of Liquids
The DFA100 foam analyser has been used in various projects to determine the lifespan of the foam and the composition of the foam through time (wet-foam vs dry-foam). Applications vary from household items such as hand soaps to commercial products such as cleaning agents.