ISSN Online: 2688-7231
ISBN Online: 978-1-56700-524-0
Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
Boiling Heat Transfer Study on Curved Surface
Pool boiling heat transfer studies are carried out in-house to look into bubble formation designs and the growth of film in a cylinder submerged in a pool. At normal atmospheric pressure, water was used as the working fluid. To observe all boiling heat transfer regimes, a wide range of applied heat flux was examined. Nucleation, bubble merging during the transition, and sliding are all seen with great clarity during the experiment. In this research, cylinder inclinations were discovered and various inclinations of the cylinder concerning the horizontal have been tried. During the experiment, phenomena such as bubble sliding on the inclined cylinder were captured, resulting in the production of larger-sized bubbles on the surface. The interaction of several bubbles on a cylindrical surface with a diameter bigger than the departure size is investigated using a combination of experimental and computational methods. Heat transfer coefficient changes depending on the azimuthal placement of a huge cylinder, according to an in-house experimental investigation. According to studies using an inclined cylinder, the bottom-most point at the top end has the fastest bubble release and the highest heat transfer coefficient. After detachment from nucleation sites, a spiral-like bubble motion has been seen on the surface. Complex bubble dynamics have also been illustrated using analogous numerical simulation, which aids in determining the spatial variation of heat flux. The investigation of various interfacial mechanics during phase change heat transfer would aid in the development of effective heaters for industry sectors as well as the cooling of hot spots.