Gravity-free hydraulic jumps and metal femtoliter cups.
Hydraulic jumps created by gravity are seen everyday in the kitchen sink. We show that at small scales a circular hydraulic jump can be created in the absence of gravity by surface tension. The theory is motivated by our experimental finding of a height discontinuity in spreading submicron molten metal droplets created by pulsed-laser ablation. By careful control of initial conditions, this leads to solid femtoliter cups of gold, silver, copper, niobium, and tin.
Mathur
Manikandan
M
Engineering Mechanics Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
DasGupta
Ratul
R
Selvi
N R
NR
John
Neena Susan
NS
Kulkarni
G U
GU
Govindarajan
Rama
R