Júlio César Alves Ferreira
Jader R. Barbosa Jr.
Jader Riso Barbosa Jr.
Data de publicação
We studied the onset of flow reversal in upflow condensation of refrigerants in an inclinable 5-mm ID tube. As part of the condensate begins to flow downwards, solitary waves grow on the liquid substrate and are carried upwards by the vapor. As a result of the periodic changes in liquid velocity, the vaporliquid interface becomes highly disturbed. Image processing techniques were applied to high-speed video sequences to identify the onset of flow reversal and to quantify the frequency and velocities of disturbance waves and Sekoguchi-type huge waves characteristic of the transition to churn flow.
Material para downloadAcesso o material
Conheça o POSMEC
Saiba mais sobre um dos melhores programas de pós-graduação em engenharia mecânica do BrasilQuero conhecer