TU Darmstadt / ULB / TUbiblio

Influence of microscale concentration gradients in nucleate boiling heat transfer of binary mixtures

Kern, J. and Stephan, Peter (2000):
Influence of microscale concentration gradients in nucleate boiling heat transfer of binary mixtures.
In: Multiphase Science and Technology, pp. 233-247, 12, (3-4), ISSN 0276-1459,
[Online-Edition: http://dx.doi.org/10.1615/MultScienTechn.v12.i3-4.140],
[Article]

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.

Item Type: Article
Erschienen: 2000
Creators: Kern, J. and Stephan, Peter
Title: Influence of microscale concentration gradients in nucleate boiling heat transfer of binary mixtures
Language: English
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.

Journal or Publication Title: Multiphase Science and Technology
Volume: 12
Number: 3-4
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Date Deposited: 10 Mar 2015 16:36
Official URL: http://dx.doi.org/10.1615/MultScienTechn.v12.i3-4.140
Export:
Suche nach Titel in: TUfind oder in Google

Optionen (nur für Redakteure)

View Item View Item