Effect of helical micro-fins on two-phase flow behavior of R410A evaporating in horizontal round tubes obtained through visualization

• Published in: International journal of heat and mass transfer Vol. 144; no. NA; p. 118654
• Main Authors: Yang, Cheng-Min, Hrnjak, Pega
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.12.2019; Elsevier BV; Elsevier
• Subjects: 3-D printers; 3D printing; Angles (geometry); Annular flow; Boiling; Boundary layer transition; ENGINEERING; Fins; Flow boiling; Flow visualization; Grooves; Helical flow; Helical micro-fins; Helix angle; Three dimensional printing; Transparent micro-fin tube; Tubes; Two phase flow; Visualization; Flow visualization; Helical micro-fins; Flow boiling; Transparent micro-fin tube; Helix angle; 3D printing
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2019.118654

•3D printed clear helical micro-fin tubes are made for visualization.•Helical grooves enable the liquid to reach a higher location in tubes.•Helix angle influences the transition from stratified flow to annular flow.•Tubes with different groove directions help understand the flow behavior. This pape...