Paper 5: Volume 3 No.4 March 2005 Edition
Comparative Experimental and Numerical Study of a
Non-Isothermal Plane Jet in aiding a Mixed Convection Regime
Abdelmadjid
Benkhelifa, Lionel Thomas, Julien Robert, François Penot
Laboratoire d’Études
Thermiques (UMR CNRS N°6608)
École Nationale
Supérieure de Mécanique et d'Aérotechnique
BP 40109 – 1,
avenue Clément Ader, 86961 Futuroscope Chasseneuil Cedex, Poitiers, France
Abstract
In this paper, a comparative
study between experiments and numerical simulations in the developing zone of a
non-isothermal plane vertical jet is presented. The low velocity airflow, in
aiding the mixed convection regime, discharges from a large rectangular nozzle
into a quiescent medium at a higher temperature.
The
"Reynolds-Averaged" Navier-Stokes equations (RANS) are solved using
both the CFD code Fluent® and the Aquilon® code, in each case applying
different turbulence models. While the two numerical codes give quite similar
results, large differences are observed between measurement and calculation on
the entrainment flow rate and other characteristic quantities. This shows that
developing regions of jets, in the mixed convection regime, are not yet
correctly described by the common turbulence models.
Key words: Non-isothermal
plane jet, aiding mixed convection, developing zone, k-
turbulence models, finite volumes, CFD code, Fluent, Aquilon.
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IJV Volume 3 No 4
Contents
Paper
1: Case Studies
Paper
2: Field Measurement
Paper
3: Pre-Heat Window
Paper
4: Buried Pipe
Paper
5: Plane Jet
Paper
6: Centrifugal Blower
Paper
7: Simplified Model
Paper
8: Thermal Comfort
|
