Abstract
To evaluate the effect of wall surface wettability on liquid film dryout mechanism of upward gas-liquid annular mist flow in a vertical pipe, an experimental study was performed using two test pipes: an acrylic pipe and a FEP pipe. Measured contact angles on the acrylic and FEP pipe surfaces were 60° and 80°, respectively. Flow observation and measurement of liquid film flow rate were respectively conducted by using a high speed video camera and a liquid film extraction method. In the acrylic pipe, once dryout occurred the dry part quickly spread and the liquid flowed up as liquid rivulets on the pipe wall. In the FEP pipe, dryout occurred in ripple region formed between disturbance waves and rewetting the dry part on the wall after the disturbance wave passed was confirmed. The liquid film flow rate near dryout condition in the FEP pipe was 7-42 times larger than that in the acrylic pipe in the tested flow conditions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
