CFD Simulation Of A Stratified Flow At The Inlet
Of A Compact Plate Heat Exchanger
Author(s)
M. Ahmad, J. F. Fourmigue, P. Mercier & G. Berthoud
Abstract
The work described in this paper considers 3D CFD (computational fluid
dynamics) simulations of an adiabatic stratified liquid-vapor flow at the inlet of a
compact plate heat exchanger using the commercial CFD code \“FLUENT” and
an in-house code \“NEPTUNE 3D” developed by CEA and EDF. An
experimental loop is built up that represents a compact plate heat exchanger in
which the liquid and vapor flow rates in the different channels are measured and
the flow inside the cylindrical distributor of diameter greater than that of the inlet
tube can be visualized. The numerical predictions showed the good agreement
with the experimental measurements. The interfacial shear stress was calculated
in a steady stratified flow and compared with the computed shear stresses by the
two codes.
Keywords: two-phase flow, maldistribution, CFD simulation, separated phase
model, compact heat exchangers.
1 Introduction
Mal-distribution of two phase flow is the main cause of the deterioration of the
thermal and hydraulic performances of heat exchangers and it is mainly affected
by the flow pattern at the condensers or evaporators inlets (Ahmad et al [1]). The
purpose of our study is to find a modeling tool capable of simulating some
possible two phase flow patterns in compact heat exchangers. One of the most
current flow patterns observed in the inlet tube of a heat exchanger is the
stratified flow.
Few authors have tested the CFD simulation models to study the distribution
in heat exchangers. Jones and Galliera [4] used FLUENT to simulate singlephase
flow distribution in the manifold that performed well in calculating the
Keywords
two-phase flow, maldistribution, CFD simulation, separated phase
model, compact heat exchangers.
Related Book
Other papers in this volume
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