Skip to main content
×
Home
    • Aa
    • Aa

Drop impact into a deep pool: vortex shedding and jet formation

  • G. Agbaglah (a1), M.-J. Thoraval (a2) (a3), S. T. Thoroddsen (a2), L. V. Zhang (a1), K. Fezzaa (a4) and R. D. Deegan (a1)...
Abstract
Abstract

One of the simplest splashing scenarios results from the impact of a single drop on a deep pool. The traditional understanding of this process is that the impact generates an axisymmetric sheet-like jet that later breaks up into secondary droplets. Recently it was shown that even this simplest of scenarios is more complicated than expected because multiple jets can be generated from a single impact event and there are transitions in the multiplicity of jets as the experimental parameters are varied. Here, we use experiments and numerical simulations of a single drop impacting on a deep pool to examine the transition from impacts that produce a single jet to those that produce two jets. Using high-speed X-ray imaging methods we show that vortex separation within the drop leads to the formation of a second jet long after the formation of the ejecta sheet. Using numerical simulations we develop a phase diagram for this transition and show that the capillary number is the most appropriate order parameter for the transition.

Copyright
Corresponding author
Email address for correspondence: agbagla@umich.edu
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

G. Agbaglah , S. Delaux , D. Fuster , J. Hoepffner , C. Josserand , S. Popinet , P. Ray , R. Scardovelli  & S. Zaleski 2011 Parallel simulation of multiphase flows using octree adaptivity and the volume-of-fluid method. C. R. Méc. 339, 194207.

A. Castrejón-Pita , J. Castrejón-Pita  & I. Hutchings 2012 Experimental observation of von Kármán vortices during drop impact. Phys. Rev. E 86, 045301.

G. E. Cossali , A. Coghe  & M. Marengo 1997 Impact of a single drop on a wetted solid surface. Exp. Fluids 22 (6), 463472.

R. D. Deegan , P. Brunet  & J. Eggers 2008 Complexities of splashing. Nonlinearity 21 (1), C1C11.

K. Fezzaa  & Y. J. Wang 2008 Ultrafast x-ray phase-contrast imaging of the initial coalescence phase of two water droplets. Phys. Rev. Lett. 100 (10), 104501.

D. Fuster , G. Agbaglah , C. Josserand , S. Popinet  & S. Zaleski 2009 Numerical simulation of droplets, bubbles and waves: state of the art. Fluid Dyn. Res. 41 (6), 065001.

C. Josserand  & S. Zaleski 2003 Droplet splashing on a thin liquid film. Phys. Fluids 15 (6), 16501657.

K. T. Kiger  & J. H. Duncan 2012 Air-entrainment mechanisms in plunging jets and breaking waves. Annu. Rev. Fluid Mech. 44, 563596.

J. M. Kolinski , S. M. Rubinstein , S. Mandre , M. P. Brenner , D. A. Weitz  & L. Mahadevan 2012 Skating on a film of air: drops impacting on a surface. Phys. Rev. Lett. 108, 074503.

M. R. Moore , H. Ockendon , J. R. Ockendon  & J. M. Oliver 2014 Capillary and viscous perturbations to Helmholtz flows. J. Fluid Mech. 742, R1. doi:10.1017/jfm.2014.39.

S. Popinet 2003 Gerris: a tree-based adaptive solver for the incompressible Euler equations in complex geometries. J. Comput. Phys. 190 (2), 572600.

S. Popinet 2009 An accurate adaptive solver for surface-tension-driven interfacial flows. J. Comput. Phys. 228 (16), 58385866.

R. Rioboo , C. Bauthier , J. Conti , M. Voue  & J. De Coninck 2003 Experimental investigation of splash and crown formation during single drop impact on wetted surfaces. Exp. Fluids 35 (6), 648652.

M.-J. Thoraval , K. Takehara , T. G. Etoh , S. Popinet , P. Ray , C. Josserand , S. Zaleski  & S. T. Thoroddsen 2012 von Karman vortex street within an impacting drop. Phys. Rev. Lett. 108 (26), 264506.

S. T. Thoroddsen , M. J. Thoraval , K. Takehara  & T. G. Etoh 2011 Droplet splashing by a slingshot mechanism. Phys. Rev. Lett. 106 (3), 034501.

A. B. Wang  & C. C. Chen 2000 Splashing impact of a single drop onto very thin liquid films. Phys. Fluids 12 (9), 21552158.

L. Xu , W. W. Zhang  & S. R. Nagel 2005 Drop splashing on a dry smooth surface. Phys. Rev. Lett. 94, 184505.

A. L. Yarin 2006 Drop impact dynamics: splashing, spreading, receding, bouncing. Annu. Rev. Fluid Mech. 38, 159192.

L. V. Zhang , P. Brunet , J. Eggers  & R. D. Deegan 2010 Wavelength selection in the crown splash. Phys. Fluids 22 (12), 122105.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×
MathJax

Keywords:

Type Description Title
VIDEO
Movies

Agbaglah et al. supplementary movie
Numerical simulation showing the bumping regime for We=700 and Re=4000

 Video (1.1 MB)
1.1 MB
VIDEO
Movies

Agbaglah et al. supplementary movie
Numerical simulation showing the vortex shedding in the two jets regime for We=500 and Re=3500

 Video (1.2 MB)
1.2 MB
VIDEO
Movies

Agbaglah et al. supplementary movie
Numerical simulation showing a smooth one jet regime for We=700 and Re=500

 Video (1.0 MB)
1.0 MB
VIDEO
Movies

Agbaglah et al. supplementary movie
Experimental movie showing the formation of a rolled up vortex sheet

 Video (789 KB)
789 KB

Metrics

Full text views

Total number of HTML views: 5
Total number of PDF views: 112 *
Loading metrics...

Abstract views

Total abstract views: 268 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 23rd March 2017. This data will be updated every 24 hours.