TY - JOUR
T1 - High-speed visualization of soap bubble blowing and image-processing-based analysis of pinch-off dynamics
AU - Davidson, John
AU - Ryu, Sangjin
N1 - Funding Information:
This work was supported by the start-up grant to SR from the University of Nebraska-Lincoln. The authors appreciate Dr. Howard Stone for his general comments on the study.
Publisher Copyright:
© 2016, The Visualization Society of Japan.
PY - 2017/2/1
Y1 - 2017/2/1
N2 - Abstract: Soap bubble blowing has long been an amusement for humans, and the process involves pinch-off similarly to liquid drops and gas bubbles. To visualize the pinch-off process of soap bubble blowing, we built an apparatus consisting of air jet flow and thin soap film on a circular ring, and replicated human soap bubbling. High-speed videography captured growing soap film tube and following pinch-off, and the minimal neck radius of the tube was measured based on image processing. Scaling law analyses show that regardless of the ring diameter, the scaling exponent of soap bubble pinch-off is about 2/3, which is similar to that of soap film bridge. Also, the speed of the airflow into the tube was evaluated based on volume calculation of the soap film tube, and the Reynolds number of the airflow was estimated to be 1060–2970, which suggests that soap bubbling may involve Bernoulli suction effect. Graphical abstract: [Figure not available: see fulltext.]
AB - Abstract: Soap bubble blowing has long been an amusement for humans, and the process involves pinch-off similarly to liquid drops and gas bubbles. To visualize the pinch-off process of soap bubble blowing, we built an apparatus consisting of air jet flow and thin soap film on a circular ring, and replicated human soap bubbling. High-speed videography captured growing soap film tube and following pinch-off, and the minimal neck radius of the tube was measured based on image processing. Scaling law analyses show that regardless of the ring diameter, the scaling exponent of soap bubble pinch-off is about 2/3, which is similar to that of soap film bridge. Also, the speed of the airflow into the tube was evaluated based on volume calculation of the soap film tube, and the Reynolds number of the airflow was estimated to be 1060–2970, which suggests that soap bubbling may involve Bernoulli suction effect. Graphical abstract: [Figure not available: see fulltext.]
KW - Bernoulli suction effect
KW - High-speed videography
KW - Pinch-off
KW - Scaling law
KW - Soap bubble
KW - Surface tension
UR - http://www.scopus.com/inward/record.url?scp=84973161049&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84973161049&partnerID=8YFLogxK
U2 - 10.1007/s12650-016-0367-5
DO - 10.1007/s12650-016-0367-5
M3 - Article
AN - SCOPUS:84973161049
SN - 1343-8875
VL - 20
SP - 53
EP - 61
JO - Journal of Visualization
JF - Journal of Visualization
IS - 1
ER -