An Oil Droplet That Spontaneously Climbs up Stairs | Zendy

Yutaka Sumino | Zendy; Nobuyuki Magome | Zendy; Kenichi Yoshikawa | Zendy

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An Oil Droplet That Spontaneously Climbs up Stairs

Author(s) -

Yutaka Sumino,

Nobuyuki Magome,

Kenichi Yoshikawa

Publication year - 2006

Publication title -

progress of theoretical physics supplement

Language(s) - English

Resource type - Journals

ISSN - 0375-9687

DOI - 10.1143/ptps.161.348

Subject(s) - stairs , physics , surface tension , climbing , focus (optics) , mechanics , oil droplet , motion (physics) , tension (geology) , classical mechanics , optics , thermodynamics , chemical engineering , engineering , emulsion , history , civil engineering , archaeology , moment (physics)

It has been reported that an oil droplet on a glass surface moves spontaneously in an oil-water system. This motion of an oil droplet can be understood as the spreading of a reactive droplet, which is induced by the interfacial tension gradient at the glass surface. In this paper, we focus on the spontaneous motion of an oil droplet climbing up stairs. We found that an oil droplet tends to move up the stairs rather than to step down. We describe some of the mechanisms of this unique behavior.

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