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  Viscoplastic water entry

Jalaal, M., Kemper, D., & Lohse, D. (2019). Viscoplastic water entry. Journal of Fluid Mechanics, 864, 596-613. doi:10.1017/jfm.2019.32.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-0E58-C Version Permalink: http://hdl.handle.net/21.11116/0000-0003-0E59-B
Genre: Journal Article

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 Creators:
Jalaal, M., Author
Kemper, D., Author
Lohse, Detlef1, Author              
Affiliations:
1Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063285              

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Free keywords: drops
 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.

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Language(s): eng - English
 Dates: 2019-02-112019-04-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1017/jfm.2019.32
 Degree: -

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Title: Journal of Fluid Mechanics
Source Genre: Journal
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Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 864 Sequence Number: - Start / End Page: 596 - 613 Identifier: -