High speed photographic observation of flow patterns during flow boiling in single rectangular minichannel

Prabhu Balasubramanian
Satish Kandlikar

Proceedings from the summer heat transfer conference, July 21-23, 2003. The complete proceedings can be found at www.asme.org . Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works in February 2014.


The present study extends the range of flow patterns observed during boiling of water in a single minichannel of height 197 mm and width 1054 mm. The calculated hydraulic diameter of the channel is 333 mm. High-speed photography is used to obtain video images of the flow field. The top covers of the channels are made of Lexan to permit visual observation, while the minichannel is machined in a copper block heated with cartridge heaters . The flow patterns are studied as a function of mass flux, heat flux, and location along the flow channel length. The results provide important information regarding the boiling behavior in a single channel.