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Two different modes of coalescence of liquid drops in a confined space

Ko Okumura Ochanomizu University, Tokyo

Recently we found several scaling laws on wetting, granular materials, and
fracture of materials. This is as a result of performing experimental and
theoretical studies at the same time. In this talk, we pick up coalescence
of viscous drops. After briefly reviewing recent development in the related
fields, we discuss two different types of coalescence recently found in a
Hele-Shaw cell. We develop scaling theory for these phenomena and
demonstrate the agreement of the theory with our experimental data.

[1] Maria YOKOTA and Ko OKUMURA, Proc. Nat. Acad. Sci. (USA), 108
(2011).

[2] Ayako ERI and Ko OKUMURA, Phys. Rev. E Rapid Comm., 82 (2010).