Rein, Martin und Delplanque, Jean-Pierre (2008) On the splashing threshold of droplets impinging on solid surfaces. 79th Annual Meeting of the International Association of Applied Mathematics and Mechanics, 2008-03-31 - 2008-04-04, Bremen.
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Kurzfassung
When a drop impinges on a dry solid surface it can stick to the surface, spread, bounce off the surface or splash. It is shown that critical conditions of splashing inception, the so-called splashing threshold, have often been obtained under slightly different experimental conditions and are partly contradictory. Furthermore, no general agreement on the basic physical mechanism causing splashing does exist. After considering those parameters that are likely to govern splashing in a dimensional analysis, limiting conditions of splashing are re-evaluated comparing the specifics of different experimental setups. Information drawn from these considerations is used to distinguish between different splashing thresholds. Existing correlations of the threshold can be divided into (at least) two groups. In addition to the roughness also the degree of dryness of the surface may be important. Finally, for smooth surfaces there is evidence that the wetting behaviour plays an important role for the inception of splashing. Based on the discussion a possible mechanism causing the onset of splashing on smooth surfaces is proposed. This mechanism may also explain the well-known fingering of the liquid lamella formed after impact.
elib-URL des Eintrags: | https://elib.dlr.de/54411/ | ||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||
Titel: | On the splashing threshold of droplets impinging on solid surfaces | ||||||||||||
Autoren: |
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Datum: | April 2008 | ||||||||||||
Open Access: | Nein | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Nein | ||||||||||||
In ISI Web of Science: | Nein | ||||||||||||
Stichwörter: | drops, splash, air entrainment, wetting, spreading | ||||||||||||
Veranstaltungstitel: | 79th Annual Meeting of the International Association of Applied Mathematics and Mechanics | ||||||||||||
Veranstaltungsort: | Bremen | ||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||
Veranstaltungsbeginn: | 31 März 2008 | ||||||||||||
Veranstaltungsende: | 4 April 2008 | ||||||||||||
Veranstalter : | Gesellschaft für Angewandte Mathematik und Mechanik | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||
HGF - Programmthema: | Starrflügler (alt) | ||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
DLR - Forschungsgebiet: | L AR - Starrflüglerforschung | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Militärische Technologien (alt) | ||||||||||||
Standort: | Göttingen | ||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen | ||||||||||||
Hinterlegt von: | Rein, Prof.Dr. Martin | ||||||||||||
Hinterlegt am: | 26 Jun 2008 | ||||||||||||
Letzte Änderung: | 24 Apr 2024 19:18 |
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