A two-phase mixture model of liquid-gas flow and heat transfer in capillary porous media—I. Formulation

1993 ◽  
Vol 36 (11) ◽  
pp. 2747-2758 ◽  
Author(s):  
Wang Chao-Yang ◽  
C. Beckermann
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Mixture Model ◽  
Gas Flow ◽  
Two Phase ◽  
Flow And Heat Transfer ◽  
Phase Mixture

The effects of tape insert material on the flow and heat transfer in a nanofluid-based double tube heat exchanger: Two-phase mixture model

2019 ◽  
Vol 156 ◽  
pp. 397-409 ◽  
Author(s):  
Ali Karimi ◽  
Abdullah A.A.A. Al-Rashed ◽  
Masoud Afrand ◽  
Omid Mahian ◽  
Somchai Wongwises ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Mixture Model ◽  
Two Phase ◽  
Tube Heat Exchanger ◽  
Flow And Heat Transfer ◽  
Phase Mixture

A modified two-phase mixture model of nanofluid flow and heat transfer in a 3-D curved microtube

2016 ◽  
Vol 27 (5) ◽  
pp. 2175-2185 ◽  
Author(s):  
Omid Ali Akbari ◽  
Mohammad Reza Safaei ◽  
Marjan Goodarzi ◽  
Noreen Sher Akbar ◽  
Majid Zarringhalam ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mixture Model ◽  
Nanofluid Flow ◽  
Two Phase ◽  
Flow And Heat Transfer ◽  
Phase Mixture

scholarly journals Numerical Prediction of Two-Phase Flow in Tube Bundles with a CFD Porous Media Approach Based on Mixture Model and a Void Fraction Correlation

2021 ◽  
Vol 321 ◽  
pp. 01002
Author(s):  
Claire Dubot ◽  
Vincent Melot ◽  
Claudine Béghein ◽  
Cyrille Allery ◽  
Clément Bonneau
Keyword(s):  
Porous Media ◽  
Mixture Model ◽  
Void Fraction ◽  
Two Phase Flow ◽  
Numerical Prediction ◽  
Phase Flow ◽  
Two Phase ◽  
Mixture Density ◽  
Tube Bundles ◽  
Phase Mixture

Being able to predict the void fraction is essential for a numerical prediction of the thermohydraulic behaviour in steam generators. Indeed, it determines two-phase mixture density and affects two-phase mixture velocity which enable to evaluate the pressure drop of heat exchanger, the mass transfer and heat transfer coefficients. In this study, the flow is modelled by coupling Ansys Fluent with an in-house code library where a CFD porous media approach is implemented. In this code, the two-phase flow has been modelled so far using the Eulerian model. However, this two-phase model requires interaction laws between phases which are not known and/or reliable for a flow within a tube bundle. The aim of this paper is to use the mixture model, for which it is easier to implement suitable correlations for tube bundles. By expressing the relative velocity, as a function of slip, the void fraction model of Feenstra et al. developed for upward cross-flow through horizontal tube bundles is introduced. With this method, physical phenomena that occur in tube bundles are taken into consideration in the mixture model. The developed approach is validated based on the experimental results obtained by Dowlati et al.

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