Oliveira, Jeferson D. deCopetti, Jacqueline B.Cardoso, Elaine M. [UNESP]2023-03-012023-03-012022-01-01Lecture Notes in Mechanical Engineering, p. 147-153.2195-43642195-4356http://hdl.handle.net/11449/239913Flow patterns are found in many processes involving multiphase flows in the industry. This experimental investigation focuses on the behavior of the vorticity fields found in the liquid-vapor interface during flow boiling of R-600a with heat flux varying from 5 to 20 kW/m 2 and fixed mass flux of 890 kg/(m 2 s) at a saturation temperature of 17 ∘ C. Tests were performed in a horizontal tube with 1.0 mm ID. Four different flow patterns were identified based on images, and the vorticity fields were investigated using an optical flow method.147-153engFlow boilingFlow patternsOptical flowVorticityTrabalho apresentado em evento10.1007/978-3-030-93456-9_132-s2.0-85128557528