Energy savings on heavy oil transportation through core annular flow pattern: An experimental approach: an experimental approach - Coelho, Nelize Maria de Almeida; Taqueda, Maria Elena Santos; Souza, Nayara Mota Oliveira; Paiva, José Luís de; Santos, Aldo Ramos; Lia, Luis Renato Bastos; Moraes, Marlene Silva de; Moraes Júnior, Deovaldo (International Journal of Multiphase Flow, 2020)