Computational Heat Transfer and Entropy Generation Analysis of Natural Convection in a Trapezoidal Cavity

Olabode Thomas Olakoyejo; Olayinka Omowunmi Adewumi; Oluwafisayo Oloruntoba; Ibrahim Ademola Fetuga; Sogo Mayokun Abolarin; Olalekan Ahmed Ademolu; Adekunle Adetayo Yekini; Antonio Marcos de Oliveira Siqueira; Júlio César Costa Campos

doi:10.18540/jcecvl10iss10pp21156

Authors

Olabode Thomas Olakoyejo University of Lagos, Nigeria https://orcid.org/0000-0001-9942-1339
Olayinka Omowunmi Adewumi University of Lagos, Nigeria https://orcid.org/0000-0002-3545-6679
Oluwafisayo Oloruntoba University of Lagos, Nigeria https://orcid.org/0009-0004-6339-5625
Ibrahim Ademola Fetuga University of Lagos, Nigeria https://orcid.org/0000-0002-1943-4234
Sogo Mayokun Abolarin University of the Free State, South Africa
Olalekan Ahmed Ademolu Lagos State University of Science and Technology, Nigeria https://orcid.org/0009-0005-1596-9169
Adekunle Adetayo Yekini Lagos State University of Science and Technology, Nigeria https://orcid.org/0000-0003-3053-2297
Antonio Marcos de Oliveira Siqueira Federal University of Vicosa, Brazil https://orcid.org/0000-0001-9334-0394
Júlio César Costa Campos Federal University of Viçosa, Brazil

DOI:

https://doi.org/10.18540/jcecvl10iss10pp21156

Keywords:

Finite volume method, Entropy generation, Natural convection, Rayleigh’s number, Trapezoidal cavity

Abstract

A numerical study is carried out to investigate natural convective heat transfer process in a water-filled trapezoidal cavity heated from below using finite volume method in solving the governing equations. The study examined the effects of Rayleigh number (Ra = 10¹-10⁶), heat source length (L_s = 0.1-0.9), angle of inclination (teta = 0º-75º) on the Nusselt number (Nu) and entropy generation of the trapezoidal cavity. The results of the investigation indicate that Nu increases when the source length increases, and the angle of inclination decreases. Also, Nu also increases with Ra when the source length and inclination angle are fixed. The total entropy is dominated by thermal entropy generation (S_thermal) and is seen to increase with source length. The results presented in isotherms and streamlines indicate that viscous and buoyancy forces are significant in the trapezoidal cavity.

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References

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