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The Role of Air Entrainment on the Outcome of Drop Impact on a Solid Surface

Rein, Martin and Delplanque, Jean-Pierre (2008) The Role of Air Entrainment on the Outcome of Drop Impact on a Solid Surface. Acta Mechanica, 201, pp. 105-118. doi: 10.1007/s00707-008-0076-9.

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The characteristic conditions causing spreading or splashing after drop impact on solid surfaces are considered together with the underlying mechanisms. To this end, the results of the various studies published over the past few years that have addressed the issue of splashing after droplet impact, specifically in terms of the definition of a splashing threshold, are critically compared and synthesized. The discussion aims at clarifying some of the conflicting findings. Information drawn from these considerations is used to distinguish between various splashing thresholds and it is shown that there exists a distinct difference between splashing on smooth and on rough surfaces, both in terms of the splashing thresholds and in terms of the mechanisms. Finally, a physical mechanism akin to air entrainment in dynamic wetting is proposed that may be of primary importance for the inception of splashing as well as fingering on smooth surfaces.

Item URL in elib:https://elib.dlr.de/54451/
Document Type:Article
Title:The Role of Air Entrainment on the Outcome of Drop Impact on a Solid Surface
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Delplanque, Jean-PierreUniversity of California, DavisUNSPECIFIED
Date:December 2008
Journal or Publication Title:Acta Mechanica
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s00707-008-0076-9
Page Range:pp. 105-118
Keywords:drops, splashing, spreading, air entrainment, fingering, dynamic wetting
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Rein, Prof.Dr. Martin
Deposited On:12 Jan 2009
Last Modified:27 Apr 2009 15:01

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