Eulerian Model For The Prediction Of Nucleate
Boiling Of Refrigerant In Heat Exchangers
Author(s)
D. Sim´on, M. C. Paz, A. Eir´ıs & E. Su´arez
Abstract
In this article, a boiling model for \“Fluent 6” fluid flow simulation software, for its
use in gas-liquid heat exchangers, is presented. After a thorough study of existing
bibliographies, a physical model has been compiled, which has been incorporated
into the eulerian multiphase model, the most suitable of those available in Fluent
for the resolution of these kinds of multiphase flows. Also discussed are some
of the aspects of the implementation, which basically consist of the modeling of
the interactions between phases as source terms in the governing equations solved
by Fluent. Finally, the implementation of the model has been validated against
experimental tests from the available literature, achieving a satisfactory degree of
concordance.
Keywords: CFD, heat exchangers, nucleate boiling, FLUENT, multiphase,
eulerian.
1 Introduction
The study of boiling is one of the requirements in the design stages. The
experimental tests in this field are complex and very costly, which means that a
computer tool is necessary to make quick and economical predictions.
The boiling model presented in this paper is physically valid for the region
of nucleate or sub-cooled boiling. The equations shown are based on local
parameters in order to be applied to any geometry, having undertaken the necessary
generalizations from the correlations, which were originally obtained in
experimental tests. A modification of the Kurul and Podowski [1] model is
employed, which has successfully been applied to diverse geometries by several
authors.
Keywords
CFD, heat exchangers, nucleate boiling, FLUENT, multiphase,
eulerian
Related Book
Other papers in this volume
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