To Split or Not to Split: Dynamics of an Air Disk Formed under a Drop Impacting on a Pool
Type
ArticleAuthors
Jian, Zhen
Channa, Murad Ali

Kherbeche, Abderrahmane

Chizari, Hossain

Thoroddsen, Sigurdur T

Thoraval, M.-J.

KAUST Department
High-Speed Fluids Imaging LaboratoryMechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2020-05-04Submitted Date
2019-01-24Permanent link to this record
http://hdl.handle.net/10754/662748
Metadata
Show full item recordAbstract
When a drop falls and impacts on a liquid pool, it entraps an air disk below the drop, which then contracts into a central bubble. Here, we use high-speed imaging and high-resolution numerical simulations to characterize the air-disk contraction dynamics for different liquid properties. We show that the air disk can contract into a single central bubble, form a toroidal bubble, or split vertically into two smaller bubbles. We demonstrate that the transitions between the different regimes can be separated by an Ohnesorge number, Ohe, based on the air-disk thickness. For the lowest Ohe, we find a new regime, where vortex shedding from the rim of the contracting air disk breaks the vertical symmetry and prevents the bubble from splitting in two.Citation
Jian, Z., Channa, M. A., Kherbeche, A., Chizari, H., Thoroddsen, S. T., & Thoraval, M.-J. (2020). To Split or Not to Split: Dynamics of an Air Disk Formed under a Drop Impacting on a Pool. Physical Review Letters, 124(18). doi:10.1103/physrevlett.124.184501Publisher
American Physical Society (APS)Journal
Physical Review LettersAdditional Links
https://link.aps.org/doi/10.1103/PhysRevLett.124.184501ae974a485f413a2113503eed53cd6c53
10.1103/physrevlett.124.184501