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Heat Transfer Research
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ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2016014504
pages 885-892

EXPERIMENTAL AND NUMERICAL ANALYSIS OF HEAT TRANSFER IN AN ATTIC-SHAPED ENCLOSURE

Francesco Corvaro
Dipartimento di Ingegneria Industriale e Scienze Matematiche (DIISM), Università Politecnica delle Marche, Ancona, Italy
Giorgia Nardini
DIISM, Dipartimento di Ingegneria Industriale e Scienze Matematiche, Università Politecnica delle Marche, Via Brecce Bianche - 60131 Ancona, ITALY
Massimo Paroncini
DIISM, Dipartimento di Ingegneria Industriale e Scienze Matematiche, Università Politecnica delle Marche, Via Brecce Bianche - 60131 Ancona, ITALY
Raffaella Vitali
DIISM, Dipartimento di Ingegneria Industriale e Scienze Matematiche, Università Politecnica delle Marche, Via Brecce Bianche - 60131 Ancona, ITALY

RÉSUMÉ

An experimental and numerical investigation of natural convection in an attic-shaped triangular cavity in winter or nighttime conditions was carried out. The cavity had three isothermal, aluminum walls and a Plexiglas wall. The experimental method used was Particle Image Velocimetry and Fluent 12.1.4 was the numerical software employed. The range of Rayleigh numbers analyzed was from 5·105 to 1·107. The isotherms, velocity maps, and streamlines produced were examined and studied. The results show that for Ra < 6.0·106 two main vortices develop in the enclosure while for Ra > 6.0·106 a third vortex begins to form.


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