5 papers
A behavioral principle underlying attacker-defender interactions in soccer
Issei Yamazaki, Hirotaka Goto, Kojiro Otoguro +3
Soccer is widely popular for its simple rules and complex yet coordinated play that unfolds on the pitch. Nevertheless, the fundamental mechanisms governing such play are not well…
Dynamics of particle lane formation in confined viscoelastic fluids under shear
Hiroto Yokoyama, Masanori Honda, Rinya Miyakawa +5
Simple shear flow can induce flow-aligned chain formation of particles suspended in viscoelastic fluids. Although this phenomenon has been reported for decades, direct {\it in situ…
Pattern transition of flow dynamics in a highly water-absorbent granular bed
Kojiro Otoguro, Kiwamu Yoshii, Yutaka Sumino
An aqueous sodium chloride solution was injected at a controlled rate into a granular bed in a quasi-two-dimensional cell. The granular bed was made of dried, highly water-absorben…
Precipitation induced filament pattern of injected fluid controlled by structured cell
Shunsuke Tanaka, Kojiro Otoguro, Miyuki Kunihiro +2
Mixing of two fluids can lead to the formation of a precipitate. If one of the fluids is injected into a confined space filled with the other, a created precipitate disrupts the fl…
Extensive tip-splitting of injected organic liquid into an aqueous viscoelastic fluid
Kiwamu Yoshii, Kojiro Otoguro, Ayane Pygoscelis Sato +1
The injection of a fluid into another fluid causes a spatiotemporal pattern along the injection front. Viscous fingering is a well-known example when the replaced material is a vis…