Viscoplastic water entry

Maziyar Jalaal (Corresponding Author), Dave Kemper, Detlef Lohse

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
6 Downloads (Pure)

Abstract

The impact of viscoplastic droplets on a free surface of water is studied. The droplet undergoes an elasto-plastic deformation at the early stages of water entry. At large time, the yield stress dominates; therefore, the droplet solidifies and reaches an equilibrium shape. Depending on the impact velocity and the rheology of the droplet, the final morphologies vary from pear-shaped to capsules that contain bubbles. We perform an analysis of the orders of magnitude of the forces and introduce the relevant dimensionless groups. Furthermore, we categorize the final shapes in a phase diagram and analyse their geometrical properties. The process presents a method of making non-spherical beads and capsules with tunable shapes and provides information on the general problem of the impact of highly deformable objects on a liquid surface.

Original languageEnglish
Pages (from-to)596-613
Number of pages18
JournalJournal of fluid mechanics
Volume864
DOIs
Publication statusPublished - 11 Feb 2019

Fingerprint

entry
capsules
water
Water
impact velocity
liquid surfaces
rheology
beads
plastic deformation
bubbles
Rheology
phase diagrams
Phase diagrams
Yield stress
Plastic deformation
Liquids

Keywords

  • UT-Hybrid-D
  • Drops

Cite this

Jalaal, Maziyar ; Kemper, Dave ; Lohse, Detlef. / Viscoplastic water entry. In: Journal of fluid mechanics. 2019 ; Vol. 864. pp. 596-613.
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Viscoplastic water entry. / Jalaal, Maziyar (Corresponding Author); Kemper, Dave; Lohse, Detlef.

In: Journal of fluid mechanics, Vol. 864, 11.02.2019, p. 596-613.

Research output: Contribution to journalArticleAcademicpeer-review

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