Thermal Confort Enhancementin A Habitat IsolatedFromthe Roof by a Porous Media
Authors: Merabti Ahmed, MehdaouiRazli, Elmir Mohamed &BenabderrahmaneFarhat NAAS Rating: 2.73- Articles can be sent to email@example.com Figure 1 :Problem Geometry THE INFLUENCE OF POROSITY To describe the effect of the Rayleigh Ra number on the flow structure and heat transfer, the following parameters:(h, H, L, Ep) Mathematical Formulation Fluid area . (1) (2) (3) (4) Porous area (5) (6) (7) (8) RESULTS AND DISCUSSIONS Current Lines and Isotherms The lines of currents shown in (FIG. 2) Show that for the small values of Ra, a single celloccupies the entire enclosure, the
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The large share of energy consumed for the heating or cooling of buildings has led researchers to address the issue
of heat exchange between premises and the environment.
Since Much of the heat loss occurs through the roof, insulating materials slow down heat Transfer through
the building envelope. The quality of the insulation required depends on the climate, the exposure of the roofs and also
the materials used for the construction. The choice of a material used as insulation depends naturally on its availability and
cost. In this study, we propose to analyze the heat Transfer in a ceiling-insulated building by a porous medium
(glass wool), based on the effect of the Rayleigh number on the heat exchange between the Building and the outside
environment. For this purpose, a Comsol multiphysics software based on the finiteelementmethodis used to solve
the equationsgoverning heat transfer in the fluid medium as well as the porous medium. The resultswillbe in the form of
currentlines, isotherms, temperature profiles and Nuseltnumbers..