Numerical And Experimental Validation
Procedures For The Simulation Of
Refrigerated Rooms
Author(s)
R. A. Pitarma, J. E. Ramos & M. G. Carvalho
Abstract
This paper presents two techniques (models), one computational and another
experimental, to study the three-dimensional turbulent non-isothermal flow in
refrigerated chambers. The computational model consists on a numerical
procedure which solves, in finite-volume method, the three-dimensional timeaveraged
equations for the conservation of mass, momentum, energy and
concentration of species. The effect of turbulence is described by the k-ε model.
The predict results were experimentally validated through the comparison with
measurements taken from an experimental reduced-scale model, designed to
provide similarity with the real chamber. Due to the limitations of the similarity
theory based on Prandtl, Reynolds and Archimedes numbers, a simple physical
modelling technique, based on the dimensional analysis, was used to derive the
physical properties of the laboratory model. In order to demonstrate the models
applicability, two-case study of refrigerated chambers (natural convection and
forced convection) was performed for the simulation and visualization of the
thermal, humidity and air flow patterns. Agreement between measured and
predicted values was very satisfactory for engineering purposes.
Keywords
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