Title :
Bubble movements at boiling bubbly flow in a horizontal serpentine tube
Author :
Huang, Mei ; Yang, Zhen ; Duan, Yuan-Yuan ; Wang, Bu-Xuan
Author_Institution :
Dept. of Thermal Eng., Tsinghua Univ., Beijing, China
Abstract :
Bubble movements in flow boiling in a horizontal serpentine tube were experimentally studied. The serpentine tube was made of quartz glass for flow observation and a CCD camera was used for recording flow images. Adjusting flowrate and heat flux obtained bubble flows throughout the tube. Bubbles were found to accelerate in the bend regions. A single-phase flow simulation was developed for revealing velocity and temperature details. The secondary flow at bends was found to interrupt the flow boundary layers at the bend and cause the extraordinary dynamic and thermal behaviors of bubbles.
Keywords :
boiling; boundary layers; bubbles; flow simulation; flow visualisation; heat transfer; pipe flow; two-phase flow; CCD camera; boiling bubbly flow process; bubble dynamic behavior; bubble movement process; bubble thermal behavior; flow boundary layers; flow image analysis; heat flux; horizontal serpentine tube flow; quartz glass; secondary flow behavior; single-phase flow simulation; Resistance heating; Three dimensional displays; bubbly flow; flow boiling; secondary flow; supentine tube;
Conference_Titel :
Communication Software and Networks (ICCSN), 2011 IEEE 3rd International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-485-5
DOI :
10.1109/ICCSN.2011.6014896
