Schmidt, J. Benedikt ; Hofmann, Julian ; Tenzer, Fabian M. ; Breitenbach, Jan ; Tropea, Cameron ; Roisman, Ilia V. (2021)
Thermosuperrepellency of a hot substrate caused by vapour percolation.
In: Communications Physics, 4 (1)
doi: 10.1038/s42005-021-00680-7
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Drop rebound after collision with a very hot substrate is usually attributed to the Leidenfrost effect, characterized by intensive film boiling in a thin vapour gap between the liquid and substrate. Similarly, drop impact onto a cold superhydrophobic substrate leads to a complete drop rebound, despite partial wetting of the substrate. Here we study the repellent properties of hot smooth hydrophilic substrates in the nucleate boiling, non-Leidenfrost regime and discover that the thermally induced repellency is associated with vapour percolation on the substrate. The wetting structure in the presence of the percolating vapour rivulets is analogous to the Cassie-Baxter wetting mode, which is a necessary condition for the repellency in the isothermal case. The theoretical predictions for the threshold temperature for vapour percolation agree well with the experimental data for drop rebound and correspond to the minimum heat flux when spray cooling.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Schmidt, J. Benedikt ; Hofmann, Julian ; Tenzer, Fabian M. ; Breitenbach, Jan ; Tropea, Cameron ; Roisman, Ilia V. |
| Art des Eintrags: | Bibliographie |
| Titel: | Thermosuperrepellency of a hot substrate caused by vapour percolation |
| Sprache: | Englisch |
| Publikationsjahr: | 13 August 2021 |
| Ort: | London |
| Verlag: | Nature Research |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Communications Physics |
| Jahrgang/Volume einer Zeitschrift: | 4 |
| (Heft-)Nummer: | 1 |
| Kollation: | 8 Seiten |
| DOI: | 10.1038/s42005-021-00680-7 |
| URL / URN: | https://www.nature.com/articles/s42005-021-00680-7 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Drop rebound after collision with a very hot substrate is usually attributed to the Leidenfrost effect, characterized by intensive film boiling in a thin vapour gap between the liquid and substrate. Similarly, drop impact onto a cold superhydrophobic substrate leads to a complete drop rebound, despite partial wetting of the substrate. Here we study the repellent properties of hot smooth hydrophilic substrates in the nucleate boiling, non-Leidenfrost regime and discover that the thermally induced repellency is associated with vapour percolation on the substrate. The wetting structure in the presence of the percolating vapour rivulets is analogous to the Cassie-Baxter wetting mode, which is a necessary condition for the repellency in the isothermal case. The theoretical predictions for the threshold temperature for vapour percolation agree well with the experimental data for drop rebound and correspond to the minimum heat flux when spray cooling. |
| Freie Schlagworte: | Energy modelling, Fluid dynamics, Phase transitions and critical phenomena, Wetting |
| ID-Nummer: | Artikel-ID: 181 |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Strömungslehre und Aerodynamik (SLA) 16 Fachbereich Maschinenbau > Fachgebiet Strömungslehre und Aerodynamik (SLA) > Tropfendynamik und Sprays |
| TU-Projekte: | DFG|TRR75|TP C4 TRR 75 Industrieverband Deutsche Mass|IMU51|IMU-Spray |
| Hinterlegungsdatum: | 30 Aug 2021 06:38 |
| Letzte Änderung: | 26 Sep 2024 07:28 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Thermosuperrepellency of a hot substrate caused by vapour percolation. (deposited 25 Sep 2024 11:50)
- Thermosuperrepellency of a hot substrate caused by vapour percolation. (deposited 30 Aug 2021 06:38) [Gegenwärtig angezeigt]
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