3 papers
cond-mat.soft2025
Universality in the velocity jump in the crack propagation observed for food-wrapping films for daily use
Aoi Nohara, Ko Okumura
The velocity jump found in the crack propagation for rubbers has been a powerful tool for developing tough rubber materials. Although it is suggested by a theory that the jump coul…
physics.flu-dyn2024
Continuous generation of confined bubbles: viscous effect on the gravito-capillary pinch off
Haruka Hitomi, Ko Okumura
We investigate continuous generation of bubbles from a bath of air in viscous liquid in a confined geometry. In our original setup, bubbles are spontaneously generated by virtue of…
cond-mat.soft2002
Water spring: a model for bouncing drops
K. Okumura, F. Chevy, C. Clanet +2
It has been shown that a water drop can bounce persistently, when thrown on a super-hydrophobic substrate. We present here scaling arguments which allow us to predict the maximal d…