Bubble Sliding Growth Phenomena and Mass Velocity and Heat Flux Effect on Sliding Bubble Growth

A visual experiment is carried out with water as working fluid at higher system pressure to investigate the bubble growth in vertical narrow channel in this paper.It is found that the bubble growth is significantly restrained with the increasing of system pressure,resulting in obviously decrease in bubble size within the same growth time.Also the bubble growth time at nucleation point will be shortened notably with higher system pressure.The main bubble growing period is during bubble sliding,and the bubble will lift off and return to the heating wall periodically.Growth of sliding bubble would not be affected by mass flux and heat flux monotonously.