Natural Convection of Heat Transfer in a Vertical Conical Annular Porous Medium. Global Journal of Science Frontier Research, [S. l.], v. 13, n. 46, p. 1–14, 2013. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/. Acesso em: 22 oct. 2026.