BifurcatedbubblingYingnan Shen, Liang Hu*, Yanshen Fang, Xin Fu

0o 90o 180o 270o 360o

We found bifurcated bubbling which comesfrom Taylor flows injecting into liquid with: Various bifurcation angles Various bubble radius R Bubble chains rotation Even unequal R Even 3 chains

R≈0.4mm

State Key Laboratory of Fluid Power & Mechatronic Systems, Zhejiang University, China

3 chainsR≈0.2mm

Mustbubblingbehaveasasinglechainof

verticalrisingbubbles?

3mm

R≈0.8mm 2mm

Unequal R0.3/0.2mm

Various bifurcation angles

R≈1.2mm

Various bubble radius R

Bubble chains rotation

Taylor flows

Physical reason: bubble interaction

0o 5o 20o 35o

Symmetry

Asymmetry

TheNewBubblingOnenozzle,Morechains,

Moreorientations.

1100o/s