Sontheimer, Henrik ; Kind, Johannes ; Stephan, Peter ; Gambaryan-Roisman, Tatiana (2024)
Numerical simulation of drop array impingement onto a superheated wall.
ICLASS 2024, 16th Triennial International Conference on Liquid Atomization and Spray Systems. Shanghai, China (June 23-27, 2024)
Konferenzveröffentlichung, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Spray cooling is a very efficient method for thermal management of high-performance electronics. The performance of spray cooling is determined by the fluid dynamics and the heat transport when a single drop or multiple drops hit the superheated wall. To understand this process, we numerically study the generic situation of simultaneous impingement of periodic drop arrays onto a superheated wall. We study three different cases in which the distance between the drops varies. The refrigerant used is perfluorohexane (FC-72) in a pure vapor atmosphere under saturation conditions. Drops impinge at moderate Reynolds and Weber numbers, where no splashing occurs during single drop impingement. The wall temperature is above the saturation temperature of the fluid but below the onset of nucleate boiling. Simulations are performed using the OpenFOAM software library, taking into account a dynamic contact angle, evaporation and conjugate heat transfer. We show that the coalescence of more than two drops results in the formation of a liquid jet. A small distance between the drops results in the formation of a thin liquid film while a large distance results in small drops sitting on the wall. In the latter case, the largest amount of heat is transferred, but the occurrence of dry spots is undesirable for cooling applications. The results contribute to a better understanding of spray cooling and provide a perspective for efficient spray cooling.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Sontheimer, Henrik ; Kind, Johannes ; Stephan, Peter ; Gambaryan-Roisman, Tatiana |
| Art des Eintrags: | Bibliographie |
| Titel: | Numerical simulation of drop array impingement onto a superheated wall |
| Sprache: | Englisch |
| Publikationsjahr: | 2024 |
| Ort: | Shanghai |
| Kollation: | 10 ungezählte Seiten |
| Veranstaltungstitel: | ICLASS 2024, 16th Triennial International Conference on Liquid Atomization and Spray Systems |
| Veranstaltungsort: | Shanghai, China |
| Veranstaltungsdatum: | June 23-27, 2024 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Spray cooling is a very efficient method for thermal management of high-performance electronics. The performance of spray cooling is determined by the fluid dynamics and the heat transport when a single drop or multiple drops hit the superheated wall. To understand this process, we numerically study the generic situation of simultaneous impingement of periodic drop arrays onto a superheated wall. We study three different cases in which the distance between the drops varies. The refrigerant used is perfluorohexane (FC-72) in a pure vapor atmosphere under saturation conditions. Drops impinge at moderate Reynolds and Weber numbers, where no splashing occurs during single drop impingement. The wall temperature is above the saturation temperature of the fluid but below the onset of nucleate boiling. Simulations are performed using the OpenFOAM software library, taking into account a dynamic contact angle, evaporation and conjugate heat transfer. We show that the coalescence of more than two drops results in the formation of a liquid jet. A small distance between the drops results in the formation of a thin liquid film while a large distance results in small drops sitting on the wall. In the latter case, the largest amount of heat is transferred, but the occurrence of dry spots is undesirable for cooling applications. The results contribute to a better understanding of spray cooling and provide a perspective for efficient spray cooling. |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| 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 DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen > Projektbereich C: Neue und verbesserte Anwendungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1194: Wechselseitige Beeinflussung von Transport- und Benetzungsvorgängen > Projektbereich C: Neue und verbesserte Anwendungen > C02: Skalenübergreifende Experimente zum Sieden komplexer Fluide an komplexen Oberflächen DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios > TRR 75 Tropfendynamische Prozesse unter extremen Umgebungsbedingungen |
| TU-Projekte: | Bund/BMWi|03EN2026A|LoTuS DFG|TRR75|TP C1 TRR 75 DFG|SFB1194|TP C02 Stephan |
| Hinterlegungsdatum: | 08 Jul 2024 06:24 |
| Letzte Änderung: | 08 Jul 2024 06:24 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Numerical simulation of drop array impingement onto a superheated wall. (deposited 05 Jul 2024 12:07)
- Numerical simulation of drop array impingement onto a superheated wall. (deposited 08 Jul 2024 06:24) [Gegenwärtig angezeigt]
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