Microlayer dynamics during the growth process of a single vapour bubble under subcooled flow boiling conditions

The phenomena of microlayer formation and its dynamic characteristics during the nucleate pool boiling regime have been widely investigated in past. However, experimental works on real-time dynamics flow conditions are highly scarce. present work is an attempt to address this lacuna concerned with developing a fundamental understanding growth process single vapour bubble under conditions. Boiling experiments conducted subcooled vertical rectangular channel water as working fluid. Thin-film interferometry combined high-speed cinematography adopted simultaneously capture behaviour along process. Transients associated recorded form interferometric fringe patterns, which clearly reveal evolution beneath growing bubble, movement triple contact line dryspot region While symmetric was confirmed early phase, bulk flow-induced deformation rendered asymmetry profile later stages patterns quantitatively analysed obtain thickness profiles at different For Re = 3600, maximum almost wedge-shaped obtained δ ~ 3.5 μm for diameter 1.6 mm. Similarly, 6000, 2.5 1.1