TU Darmstadt / ULB / TUbiblio

Hydrodynamics and heat transport during the vertical coalescence of multiple drops impacting successively onto a hot wall

Sontheimer, Henrik ; Gholijani, Alireza ; Stephan, Peter ; Gambaryan-Roisman, Tatiana (2023)
Hydrodynamics and heat transport during the vertical coalescence of multiple drops impacting successively onto a hot wall.
In: International Journal of Heat and Mass Transfer, 204
doi: 10.1016/j.ijheatmasstransfer.2023.123856
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

In this work, hydrodynamics and heat transport during the vertical coalescence of multiple drops impacting successively onto a hot wall are studied numerically and experimentally. The numerical model uses the volume of fluid method within the OpenFOAM library and takes evaporation into account. The significant heat transfer at the three-phase contact line is considered in a subgrid model. FC-72 is used as working fluid in a pure, saturated vapor atmosphere at ambient pressure. For the case of a drop chain of low impact frequency, numerical results are compared with experimental data. In particular, temperature and heat flux fields at the drop footprint as well as drop shape are compared between experiments and simulations. During the impingement of the second drop, several rings of high heat flux are observed in experiment and predicted by simulations, and the physical reasons of their appearance are elucidated by the analysis of simulated velocity and temperature fields. Furthermore, the impact of a drop chain consisting of five drops impacting at a high frequency is studied numerically. The drop chain configuration enhances both spreading and heat transport compared to the case of a single drop impact with a five-fold volume.

Typ des Eintrags: Artikel
Erschienen: 2023
Autor(en): Sontheimer, Henrik ; Gholijani, Alireza ; Stephan, Peter ; Gambaryan-Roisman, Tatiana
Art des Eintrags: Bibliographie
Titel: Hydrodynamics and heat transport during the vertical coalescence of multiple drops impacting successively onto a hot wall
Sprache: Englisch
Publikationsjahr: 1 Mai 2023
Verlag: Elsevier
Titel der Zeitschrift, Zeitung oder Schriftenreihe: International Journal of Heat and Mass Transfer
Jahrgang/Volume einer Zeitschrift: 204
DOI: 10.1016/j.ijheatmasstransfer.2023.123856
Kurzbeschreibung (Abstract):

In this work, hydrodynamics and heat transport during the vertical coalescence of multiple drops impacting successively onto a hot wall are studied numerically and experimentally. The numerical model uses the volume of fluid method within the OpenFOAM library and takes evaporation into account. The significant heat transfer at the three-phase contact line is considered in a subgrid model. FC-72 is used as working fluid in a pure, saturated vapor atmosphere at ambient pressure. For the case of a drop chain of low impact frequency, numerical results are compared with experimental data. In particular, temperature and heat flux fields at the drop footprint as well as drop shape are compared between experiments and simulations. During the impingement of the second drop, several rings of high heat flux are observed in experiment and predicted by simulations, and the physical reasons of their appearance are elucidated by the analysis of simulated velocity and temperature fields. Furthermore, the impact of a drop chain consisting of five drops impacting at a high frequency is studied numerically. The drop chain configuration enhances both spreading and heat transport compared to the case of a single drop impact with a five-fold volume.

Zusätzliche Informationen:

Artikel-ID: 123856

Fachbereich(e)/-gebiet(e): 16 Fachbereich Maschinenbau
16 Fachbereich Maschinenbau > Fachgebiet für Technische Thermodynamik (TTD)
Zentrale Einrichtungen
Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ)
Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) > Hochleistungsrechner
Hinterlegungsdatum: 23 Jan 2023 06:49
Letzte Änderung: 09 Mai 2023 05:13
PPN:
Export:
Suche nach Titel in: TUfind oder in Google
Frage zum Eintrag Frage zum Eintrag

Optionen (nur für Redakteure)
Redaktionelle Details anzeigen Redaktionelle Details anzeigen