Mixed Convection and Entropy Generation in a Double-Pipe Heat Exchanger Using Hybrid Nanofluids and Helical Baffles. Al-Noor Journal of Engineering Management and Computer Science, [S. l.], v. 2, n. 4, p. 224–232, 2026. DOI: 10.71229/gep31t82. Disponível em: https://njemcs.edu.iq/index.php/njemcs/article/view/165. Acesso em: 8 sep. 2026.