4 papers
Star shaped patterns caused by colloidal aggregation during the spreading process of a droplet
Michiko Shimokawa, Hiroyuki Kitahata, Hidetsugu Sakaguchi
This research found that when an acidic solution with a low surface tension spread on the surface of a glycerol solution mixed with milk, a star shaped pattern was spontaneously fo…
Power law observed in the motion of an asymmetric camphor boat under viscous conditions
Michiko Shimokawa, Masashi Oho, Kengo Tokuda +1
We investigated the velocity of an asymmetric camphor boat moving on aqueous solutions with glycerol. The viscosity was controlled by using several concentrations of glycerol into…
Emergence of wrinkles during the curing of coatings
Michiko Shimokawa, Hikaru Yoshida, Takumi Komatsu +1
Wrinkles often emerge on a paint layer when a second coat of paint is applied on an already-coated substrate. Wrinkle formation occurs when the first layer absorbs organic solvent…
Annihilative fractals of coffee on milk formed by Rayleigh-Taylor instability
Michiko Shimokawa, Shonosuke Ohta
We have discovered a new fractal pattern, coffee exhibits on a horizontal surface, with a fractal dimension , when a heavy coffee droplet interacts with the surface…