Kern, J. ; Stephan, Peter (2000)
Influence of microscale concentration gradients in nucleate boiling heat transfer of binary mixtures.
In: Multiphase Science and Technology, 12 (3-4)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Nucleate boiling heat transfer coefficients of binary mixtures can be calculated using a micro region model. The model is described and assessed by comparing calculated heat transfer coefficients with experimental values. The model includes the governing physical phenomena, such as the meniscus curvature, the adhesion pressure, and the interfacial thermal resistance as well as the local variation of composition and liquid-vapor equilibrium and the Marangoni effect. Due to the preferential evaporation of one component of the mixture, strong concentration gradients occur close to the heated wall. The influence of these microscale concentration gradients is investigated. By means of various calculations the physical phenomena are quantified and their relevance in the nucleate boiling process is evaluated.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2000 |
| Autor(en): | Kern, J. ; Stephan, Peter |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of microscale concentration gradients in nucleate boiling heat transfer of binary mixtures |
| Sprache: | Englisch |
| Publikationsjahr: | 2000 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Multiphase Science and Technology |
| Jahrgang/Volume einer Zeitschrift: | 12 |
| (Heft-)Nummer: | 3-4 |
| URL / URN: | http://dx.doi.org/10.1615/MultScienTechn.v12.i3-4.140 |
| Kurzbeschreibung (Abstract): | Nucleate boiling heat transfer coefficients of binary mixtures can be calculated using a micro region model. The model is described and assessed by comparing calculated heat transfer coefficients with experimental values. The model includes the governing physical phenomena, such as the meniscus curvature, the adhesion pressure, and the interfacial thermal resistance as well as the local variation of composition and liquid-vapor equilibrium and the Marangoni effect. Due to the preferential evaporation of one component of the mixture, strong concentration gradients occur close to the heated wall. The influence of these microscale concentration gradients is investigated. By means of various calculations the physical phenomena are quantified and their relevance in the nucleate boiling process is evaluated. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet für Technische Thermodynamik (TTD) |
| Hinterlegungsdatum: | 10 Mär 2015 16:36 |
| Letzte Änderung: | 13 Feb 2019 14:29 |
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