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

Rianne de Jong, O.R. Enriquez Paz y Puente, Roger M. van der Meer

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)427-444
Number of pages18
JournalJournal of fluid mechanics
Volume772
DOIs
Publication statusPublished - 2015

Fingerprint

splashing
porosity
Air
air
bubbles
impact velocity

Keywords

  • METIS-310709
  • IR-96689

Cite this

@article{0bc606cb76e64ac289ca5ff4ec5d539f,
title = "Exploring droplet impact near a millimetre-sized hole: comparing a closed pit with an open-ended pore",
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.",
keywords = "METIS-310709, IR-96689",
author = "{de Jong}, Rianne and {Enriquez Paz y Puente}, O.R. and {van der Meer}, {Roger M.}",
year = "2015",
doi = "10.1017/jfm.2015.220",
language = "English",
volume = "772",
pages = "427--444",
journal = "Journal of fluid mechanics",
issn = "0022-1120",
publisher = "Cambridge University Press",

}

Exploring droplet impact near a millimetre-sized hole: comparing a closed pit with an open-ended pore. / de Jong, Rianne; Enriquez Paz y Puente, O.R.; van der Meer, Roger M.

In: Journal of fluid mechanics, Vol. 772, 2015, p. 427-444.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Exploring droplet impact near a millimetre-sized hole: comparing a closed pit with an open-ended pore

AU - de Jong, Rianne

AU - Enriquez Paz y Puente, O.R.

AU - van der Meer, Roger M.

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

KW - METIS-310709

KW - IR-96689

U2 - 10.1017/jfm.2015.220

DO - 10.1017/jfm.2015.220

M3 - Article

VL - 772

SP - 427

EP - 444

JO - Journal of fluid mechanics

JF - Journal of fluid mechanics

SN - 0022-1120

ER -