Sodtke, C. ; Ajaev, V. S. ; Stephan, Peter (2008)
Dynamics of volatile liquid droplets on heated surfaces: theory versus experiment.
In: Journal of Fluid Mechanics, 610
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We consider the evaporation of volatile liquid droplets deposited on a heated substrate in a pure saturated vapour environment. A mathematical model is developed that incorporates the effects of surface tension, evaporation, thermocapillarity, gravity, disjoining pressure, as well as unsteady heat conduction in the solid substrate. The apparent contact line is treated mathematically as a transition region between the macroscopic droplet shape and the adsorbed film of liquid on the heated substrate. Theoretical parametric studies are conducted to clarify the effects of thermocapillarity and wetting properties on the droplet dynamics. An experimental study is conducted in a closed container with de-ionized water droplets on a stainless steel foil heated by an electric current. The interface shapes are recorded together with the temperature profiles under the droplets, measured using thermochromic liquid crystals. Experiment and theory are in very good agreement as long as the conditions of applicability of our lubrication-type mathematical model are satisfied.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2008 |
| Autor(en): | Sodtke, C. ; Ajaev, V. S. ; Stephan, Peter |
| Art des Eintrags: | Bibliographie |
| Titel: | Dynamics of volatile liquid droplets on heated surfaces: theory versus experiment |
| Sprache: | Deutsch |
| Publikationsjahr: | 2008 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Fluid Mechanics |
| Jahrgang/Volume einer Zeitschrift: | 610 |
| URL / URN: | http://dx.doi.org/10.1017/S0022112008002759 |
| Kurzbeschreibung (Abstract): | We consider the evaporation of volatile liquid droplets deposited on a heated substrate in a pure saturated vapour environment. A mathematical model is developed that incorporates the effects of surface tension, evaporation, thermocapillarity, gravity, disjoining pressure, as well as unsteady heat conduction in the solid substrate. The apparent contact line is treated mathematically as a transition region between the macroscopic droplet shape and the adsorbed film of liquid on the heated substrate. Theoretical parametric studies are conducted to clarify the effects of thermocapillarity and wetting properties on the droplet dynamics. An experimental study is conducted in a closed container with de-ionized water droplets on a stainless steel foil heated by an electric current. The interface shapes are recorded together with the temperature profiles under the droplets, measured using thermochromic liquid crystals. Experiment and theory are in very good agreement as long as the conditions of applicability of our lubrication-type mathematical model are satisfied. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau > Fachgebiet für Technische Thermodynamik (TTD) Exzellenzinitiative > Exzellenzcluster > Center of Smart Interfaces (CSI) 16 Fachbereich Maschinenbau Zentrale Einrichtungen Exzellenzinitiative Exzellenzinitiative > Exzellenzcluster |
| Hinterlegungsdatum: | 17 Mär 2015 14:52 |
| Letzte Änderung: | 17 Mär 2015 14:52 |
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