The Impact of Width of the Air Gap Channel on the Mass Flow Rate, Rayleigh Number, and Efficiency of Passive Solar Heating System. Tikrit Journal of Engineering Sciences, [S. l.], v. 25, n. 3, p. 47–52, 2018. DOI: 10.25130/tjes.25.3.08. Disponível em: https://tj-es.com/ojs/index.php/tjes/article/view/87.. Acesso em: 9 sep. 2026.