Free Convective Heat Transfer in a Closed Gap between Concentric Semi-Hemispheres

Energies

Kemi Adeyeye¹  Alexander Martín-Garín²  José-Antonio Millán-García²  Abderrahmane Baïri³  Nacim Alilat³  Luis Roseiro⁴ 

[1] Department of Architecture and Civil Engineering, University of Bath, Bath BA2 7AY, UK;ENEDI Research Group, Department of Thermal Engineering, Faculty of Engineering of Gipuzkoa, Universidad del Pais Vasco UPV/EHU, Plaza Europa 1, 20018 Donostia-San Sebastián, Spain;Laboratoire Thermique Interfaces Environnement (LTIE), Université de Paris, EA 4415, 50 Rue de Sèvres, F-92410 Ville d’Avray, France;Polytechnic of Coimbra, ISEC, Rua Pedro Nunes—Quinta da Nora, 3030-199 Coimbra, Portugal;

关键词: natural convection;    electronic packaging;    numerical approach;    concentric semi-hemispheres;    buildings;    architecture;   

DOI  :  10.3390/en14227479

来源: DOAJ

【 摘 要 】

Free convective heat transfer in the closed gap between concentric semi-hemispheres is quantified by means of a numerical approach based on the volume control method using the SIMPLE algorithm. The average Nusselt number is determined for several configurations obtained by varying the cavity’s aspect ratio between 0.15 and 1.5, while the Rayleigh number varies within the 5.33 × 10³–4.50 × 10⁸ range. The results show that the correlations available in the literature dealing with concentric whole spheres cannot be used for the configuration treated here. The new correlation between the Nusselt and Rayleigh numbers proposed in this work can be applied in various engineering sectors, such as in the electronic packaging considered in this present work, buildings, and architecture.

【 授权许可】

Unknown