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Exploring droplet impact near a millimetre-sized hole: comparing a closed pit with an open-ended pore

Published online by Cambridge University Press:  05 May 2015

Rianne de Jong ,
Oscar R. Enríquez  and
Devaraj van der Meer
Rianne de Jong*
Affiliation:
Physics of Fluids Group, MESA+ Institute for Nanotechnology, and J.M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
Oscar R. Enríquez
Affiliation:
Physics of Fluids Group, MESA+ Institute for Nanotechnology, and J.M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
Devaraj van der Meer
Affiliation:
Physics of Fluids Group, MESA+ Institute for Nanotechnology, and J.M. Burgers Centre for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
*
†Email address for correspondence: jong.riannede@gmail.com
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Abstract

We investigate drop impact dynamics near closed pits and open-ended pores experimentally. The resulting impact phenomena differ greatly in each case. For a pit, we observe three distinct phenomena, which we denote as a splash, a jet and an air bubble, whose appearance depends on the distance between impact location and pit. Furthermore, we found that splash velocities can reach up to seven times the impact velocity. Drop impact near a pore, however, results solely in splashing. Interestingly, two distinct and disconnected splashing regimes occur, with a region of planar spreading in between. For pores, splashes are less pronounced than in the pit case. We state that, for the pit case, the presence of air inside it plays the crucial role of promoting splashing and allowing for air bubbles to appear.

JFM classification

Drops and Bubbles: Drops Drops and Bubbles: Drops and Bubbles
Type
Papers
Information
Journal of Fluid Mechanics , Volume 772 , 10 June 2015 , pp. 427 - 444
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Copyright
© 2015 Cambridge University Press 

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References

Bouwhuis, W., van der Veen, R. C. A., Tran, T., Keij, D. L., Winkels, K. G., Peters, I. R., van der Meer, D., Sun, C., Snoeijer, J. H. & Lohse, D. 2012 Maximal air bubble entrainment at liquid-drop impact. Phys. Rev. Lett. 109, 264501.CrossRefGoogle ScholarPubMed
Clanet, C., Béguin, C., Richard, D. & Quéré, D. 2004 Maximal deformation of an impacting drop. J. Fluid Mech. 517, 199–208.CrossRefGoogle Scholar
Delbos, A., Lorenceau, E. & Pitois, O. 2010 Forced impregnation of a capillary tube with drop impact. J. Colloid Interface Sci. 341, 171–177.CrossRefGoogle ScholarPubMed
Ding, H. & Theofanous, T. G. 2012 The inertial regime of drop impact on an anisotropic porous substrate. J. Fluid Mech. 691, 546–567.CrossRefGoogle Scholar
Eggers, J., Fontelos, M. A., Josserand, C. & Zaleski, S. 2010 Drop dynamics after impact on a solid wall: theory and simulations. Phys. Fluids 22 (6), 062101.CrossRefGoogle Scholar
Josserand, C., Lemoyne, L., Troeger, R. & Zaleski, S. 2005 Droplet impact on a dry surface: triggering the splash with a small obstacle. J. Fluid Mech. 524, 47–56.CrossRefGoogle Scholar
Josserand, C. & Zaleski, S. 2003 Droplet splashing on a thin liquid film. Phys. Fluids 15 (6), 1650–1657.CrossRefGoogle Scholar
Lorenceau, É. & Quéré, D. 2003 Drops impacting a sieve. J. Colloid Interface Sci. 263 (1), 244–249.CrossRefGoogle ScholarPubMed
Mongruel, A., Daru, V., Feuillebois, F. & Tabakova, S. 2009 Early post-impact time dynamics of viscous drops onto a solid dry surface. Phys. Fluids 21 (3), 032101.CrossRefGoogle Scholar
Riboux, G. & Gordillo, J. M. 2014 Experiments of drops impacting a smooth solid surface: a model of the critical impact speed for drop splashing. Phys. Rev. Lett. 113, 024507.Google Scholar
Richard, D., Clanet, C. & Quéré, D. 2002 Surface phenomena: contact time of a bouncing drop. Nature 417, 811.CrossRefGoogle Scholar
Rioboo, R., Marengo, M. & Tropea, C. 2002 Time evolution of liquid drop impact onto solid, dry surfaces. Exp. Fluids 33 (1), 112–124.CrossRefGoogle Scholar
Rioboo, R., Tropea, C. & Marengo, M. 2001 Outcomes from a drop impact on solid surfaces. Atomiz. Sprays 11, 155–165.CrossRefGoogle Scholar
Roisman, I. V., Weickgenannt, C. M., Lembach, A. N. & Tropea, C. 2010 Drop impact close to a pore: experimental and numerical investigations. In Proceedings of the 23rd Annual Conference on Liquid Atomization and Spray Systems, ILASS-Europe.Google Scholar
Subramani, H. J., Al-Housseiny, T., Chen, A. U., Li, M. & Basaran, O. A. 2007 Dynamics of drop impact on a rectangular slot. Ind. Engng Chem. Res. 46, 6105–6112.CrossRefGoogle Scholar
Thoroddsen, S. T. 2002 The ejecta sheet generated by the impact of a drop. J. Fluid Mech. 451, 373–381.CrossRefGoogle Scholar
Thoroddsen, S. T., Takehara, K. & Etoh, T. G. 2012 Micro-splashing by drop impacts. J. Fluid Mech. 706, 560–570.CrossRefGoogle Scholar
Tsai, P., Pacheco, S., Pirat, C., Lefferts, L. & Lohse, D. 2009 Drop impact upon micro- and nanostructured superhydrophobic surfaces. Langmuir 25 (20), 12293–12298.CrossRefGoogle ScholarPubMed
Wagner, H. 1932 Über Stoß- und Gleitvorgänge an der Oberfläche von Flüssigkeiten. Z. Angew. Math. Mech. 12 (4), 193–215.CrossRefGoogle Scholar
Worthington, A. M. 1876 On the forms assumed by drops of liquids falling vertically on a horizontal plate. Proc. R. Soc. Lond. A 25, 261–272.Google Scholar
Xu, L., Barcos, L. & Nagel, S. R. 2007 Splashing of liquids: interplay of surface roughness with surrounding gas. Phys. Rev. E 76, 066311.CrossRefGoogle ScholarPubMed
Xu, L., Zhang, W. & Nagel, S. R. 2005 Drop splashing on a dry smooth surface. Phys. Rev. Lett. 94 (18), 184505.CrossRefGoogle ScholarPubMed
Yarin, A. L. 2006 Drop impact dynamics: splashing, spreading, receding, bouncing. Annu. Rev. Fluid Mech. 38 (1), 159–192.CrossRefGoogle Scholar

de Jong et al. supplementary movie

The impact of a drop near a closed pit. Videos are shown for an increasing amount of overlap between drop and pit, with Δ* = 0.89, 0.16, -0.14. It results in different phenomena, such as a splash created at the outer edge, a jet at the inner one and an air bubble that emerges from the pit. Both side view and bottom view images are shown.

Download de Jong et al. supplementary movie(Video)
Video 7.9 MB

de Jong et al. supplementary movie

Flow inside a pit after drop impact for an overlap Δ*= 0.22 where both a splash and a jet appear.

Download de Jong et al. supplementary movie(Video)
Video 6.1 MB

de Jong et al. supplementary movie

Various videos for the impact of a drop near an open-ended pore. Each video contains both a side and a bottom view for an increasing amount of overlap between drop and pore with Δ* = 1.14, 0.94, 0.74, 0.55, 0.14 respectively. Phenomena that are observed are a slow splash, a blob, a thin splash and planar spreading.

Download de Jong et al. supplementary movie(Video)
Video 10 MB