TY - JOUR
T1 - Role of the channel geometry on the bubble pinch-off in flow-focusing devices
AU - Dollet, Benjamin
AU - Van Hoeve, Wim
AU - Raven, Jan Paul
AU - Marmottant, Philippe
AU - Versluis, Michel
PY - 2008/1/25
Y1 - 2008/1/25
N2 - The formation of bubbles by flow focusing of a gas and a liquid in a rectangular channel is shown to depend strongly on the channel aspect ratio. Bubble breakup consists in a slow linear 2D collapse of the gas thread, ending in a fast 3D pinch-off. The 2D collapse is predicted to be stable against perturbations of the gas-liquid interface, whereas the 3D pinch-off is unstable, causing bubble polydispersity. During 3D pinch-off, a scaling wm∼τ1/3 between the neck width wm and the time τ before breakup indicates that breakup is driven by the inertia of both gas and liquid, not by capillarity.
AB - The formation of bubbles by flow focusing of a gas and a liquid in a rectangular channel is shown to depend strongly on the channel aspect ratio. Bubble breakup consists in a slow linear 2D collapse of the gas thread, ending in a fast 3D pinch-off. The 2D collapse is predicted to be stable against perturbations of the gas-liquid interface, whereas the 3D pinch-off is unstable, causing bubble polydispersity. During 3D pinch-off, a scaling wm∼τ1/3 between the neck width wm and the time τ before breakup indicates that breakup is driven by the inertia of both gas and liquid, not by capillarity.
U2 - 10.1103/PhysRevLett.100.034504
DO - 10.1103/PhysRevLett.100.034504
M3 - Article
AN - SCOPUS:38549179308
SN - 0031-9007
VL - 100
JO - Physical Review Letters
JF - Physical Review Letters
IS - 3
M1 - 034504
ER -