Schmidt, J. Benedikt ; Hofmann, Julian ; Tenzer, Fabian M. ; Breitenbach, Jan ; Tropea, Cameron ; Roisman, Ilia V. (2024)
Thermosuperrepellency of a hot substrate caused by vapour percolation.
In: Communications Physics, 2021, 4 (1)
doi: 10.26083/tuprints-00023621
Artikel, Zweitveröffentlichung, Verlagsversion
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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: | 2024 |
| Autor(en): | Schmidt, J. Benedikt ; Hofmann, Julian ; Tenzer, Fabian M. ; Breitenbach, Jan ; Tropea, Cameron ; Roisman, Ilia V. |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Thermosuperrepellency of a hot substrate caused by vapour percolation |
| Sprache: | Englisch |
| Publikationsjahr: | 25 September 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 13 August 2021 |
| Ort der Erstveröffentlichung: | London |
| Verlag: | Springer Nature |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Communications Physics |
| Jahrgang/Volume einer Zeitschrift: | 4 |
| (Heft-)Nummer: | 1 |
| Kollation: | 8 Seiten |
| DOI: | 10.26083/tuprints-00023621 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/23621 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| 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 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-236216 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Strömungslehre und Aerodynamik (SLA) |
| Hinterlegungsdatum: | 25 Sep 2024 11:50 |
| Letzte Änderung: | 26 Sep 2024 07:28 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Thermosuperrepellency of a hot substrate caused by vapour percolation. (deposited 25 Sep 2024 11:50) [Gegenwärtig angezeigt]
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