title: Frozen Impacted Drop: From Fragmentation to Hierarchical Crack Patterns.
abstract: We investigate experimentally the quenching of a liquid pancake, obtained through the impact of a water drop on a cold solid substrate (0 °C to -60 °C). We show that, below a certain substrate temperature, fractures appear on the frozen pancake and the crack patterns change from a 2D fragmentation regime to a hierarchical fracture regime as the thermal shock increases. The different regimes are discussed and the transition temperatures are estimated through classical fracture scaling arguments. Finally, a phase diagram presents how these regimes can be controlled by the drop impact parameters.
authors: Sorbonne Universités, UPMC Université Paris 06, UMR 7190, Institut Jean Le Rond d'Alembert, F-75005 Paris, France and CNRS, UMR 7190, Institut Jean Le Rond d'Alembert, F-75005 Paris, France.
authors: Elisabeth
authors: E
authors: Ghabache
authors: Sorbonne Universités, UPMC Université Paris 06, UMR 7190, Institut Jean Le Rond d'Alembert, F-75005 Paris, France and CNRS, UMR 7190, Institut Jean Le Rond d'Alembert, F-75005 Paris, France.
authors: Christophe
authors: C
authors: Josserand
authors: Sorbonne Universités, UPMC Université Paris 06, UMR 7190, Institut Jean Le Rond d'Alembert, F-75005 Paris, France and CNRS, UMR 7190, Institut Jean Le Rond d'Alembert, F-75005 Paris, France.
authors: Thomas
authors: T
authors: Séon