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Ko Okumura

Department of Physics, Faculty of Science
Ochanomizu University, Tokyo, Japan

We discuss the stability of moving liquid thin film on textured surfaces in a number of situations [1], and possible nonlinear extension and its experimental confirmation of the Griffith formula in the fracture mechanics [2]. If the time allows we may talk also either on drag friction in a two-dimensional granular media [3], on viscous drag friction acting on a fluid drop confined in a Hele-Shaw cell [4], or on a simple model of spider webs which explains why radial threads stronger than the spiral threads [5].

References :

  1. Minako Hamamoto-Kuroski and Ko Okumura, Eur. Phys. J. E 30, 283 (2009).
  2. Naomi Sone, Marie Mori and Ko Okumura (submitted).
  3. Yuka Takehara, Sachika Fujioto and Ko Okumura (submitted).
  4. Ayako Eri and Ko Okumura (submitted).
  5. Yuka Aoyonagi and Ko Okumura Phys. Rev. Lett., (2010 ; in press).