Fischer, Sebastian ; Sahu, R. P. ; Sinha-Ray, S. ; Yarin, A. L. ; Gambaryan-Roisman, Tatiana ; Stephan, Peter (2017)
Effect of nano-textured heater surfaces on evaporation at a single meniscus.
In: International Journal of Heat and Mass Transfer, 108
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Nanofiber coatings have shown a unique potential for heat transfer enhancement during drop impact cooling, nucleate boiling and flow boiling. In order to get insights into the mechanisms of heat transfer enhancement invoked by the nanofiber coating, we investigated evaporation of liquid in the vicinity of an apparent contact line of a single meniscus, where the liquid-vapor interface meets the nano- textured substrate. The experiments have been performed for stationary, advancing and receding menisci. It has been found that the local heat flux in the vicinity of a stationary apparent contact line is increased by approximately 60% in the presence of nanofiber coating. The receding meniscus leaves behind an extended region, in which the pores within the nano-textured mat are fully or partially filled with evaporating liquid, which significantly contributes to the heat transfer enhancement. These phenomena can be attributed to very strong capillary forces acting within the porous media and retaining the cooling liquid in contact with the heater surface.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Fischer, Sebastian ; Sahu, R. P. ; Sinha-Ray, S. ; Yarin, A. L. ; Gambaryan-Roisman, Tatiana ; Stephan, Peter |
| Art des Eintrags: | Bibliographie |
| Titel: | Effect of nano-textured heater surfaces on evaporation at a single meniscus. |
| Sprache: | Englisch |
| Publikationsjahr: | 19 Januar 2017 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Heat and Mass Transfer |
| Jahrgang/Volume einer Zeitschrift: | 108 |
| URL / URN: | http://dx.doi.org/10.1016/j.ijheatmasstransfer.2017.01.079 |
| Kurzbeschreibung (Abstract): | Nanofiber coatings have shown a unique potential for heat transfer enhancement during drop impact cooling, nucleate boiling and flow boiling. In order to get insights into the mechanisms of heat transfer enhancement invoked by the nanofiber coating, we investigated evaporation of liquid in the vicinity of an apparent contact line of a single meniscus, where the liquid-vapor interface meets the nano- textured substrate. The experiments have been performed for stationary, advancing and receding menisci. It has been found that the local heat flux in the vicinity of a stationary apparent contact line is increased by approximately 60% in the presence of nanofiber coating. The receding meniscus leaves behind an extended region, in which the pores within the nano-textured mat are fully or partially filled with evaporating liquid, which significantly contributes to the heat transfer enhancement. These phenomena can be attributed to very strong capillary forces acting within the porous media and retaining the cooling liquid in contact with the heater surface. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Technische Thermodynamik (TTD) DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen Profilbereiche Profilbereiche > Thermo-Fluids & Interfaces |
| Hinterlegungsdatum: | 20 Feb 2017 17:25 |
| Letzte Änderung: | 23 Okt 2019 13:38 |
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