Free convective heat transfer in a closed gap between concentric semi-hemispheres

Abderrahmane Baïri; Nacim Alilat; Alexander Martín-Garín; Kemi Adeyeye; José Antonio Millán-García; Luis Roseiro

doi:10.3390/en14227479

Free convective heat transfer in a closed gap between concentric semi-hemispheres

Abderrahmane Baïri, Nacim Alilat, Alexander Martín-Garín, Kemi Adeyeye, José Antonio Millán-García, Luis Roseiro

Research output: Contribution to journal › Article › peer-review

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Abstract

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.

Original language	English
Article number	7479
Journal	Energies
Volume	14
Issue number	22
Early online date	9 Nov 2021
DOIs	https://doi.org/10.3390/en14227479
Publication status	Published - 30 Nov 2021

Keywords

Architecture
Buildings
Concentric semi-hemispheres
Electronic packaging
Natural convection
Numerical approach

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Energy (miscellaneous)
Control and Optimization
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3390/en14227479Licence: CC BY

Cite this

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abstract = "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{\textquoteright}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.",

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AU - Baïri, Abderrahmane

AU - Alilat, Nacim

AU - Martín-Garín, Alexander

AU - Adeyeye, Kemi

AU - Millán-García, José Antonio

AU - Roseiro, Luis

PY - 2021/11/30

Y1 - 2021/11/30

N2 - 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.

AB - 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.

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KW - Buildings

KW - Concentric semi-hemispheres

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KW - Natural convection

KW - Numerical approach

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Free convective heat transfer in a closed gap between concentric semi-hemispheres

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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