https://orcid.org/0000-0002-3274-6275
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Abstract
In this paper, pool boiling heat transfer data from experiments are presented to investigate bubble formation patterns and film growth on a large sized cylinder dipped in a pool. A wide range of heat flux has been applied over the cylinder to observe different regimes in boiling heat transfer. Nucleation, bubble merging during the transition, and sliding are captured through careful experimental efforts. Bubble sliding on the cylinder after inclining it with respect to horizontal has also been captured during the experiment which prompts the formation of large-sized bubbles on the surface. It has been established that the heat transfer coefficient varies nearly 2 times based on the azimuthal location of a large cylinder, bottom location of the cylinder showing the highest. Studies from inclined cylinder showed azimuthally bottom-most point of higher end has faster bubble release and highest heat transfer coefficient (∼2 times higher than top-most point of lower end). Spiral-like bubble motion has been noticed after detachment from nucleation sites over the inclined surface. Effect of cylinder surface inclination on boiling pattern has been also presented along with observations of bubble formation.
Additional information
Notes on contributors
Chandan Swaroop Meena
Chandan Swaroop Meena is presently working as a Scientist at CSIR - Central Building Research Institute, Roorkee, Uttarakhand, India (National Laboratory). He received his Ph.D. degree from the Indian Institute of Technology Roorkee, India. His research interests are computational fluid dynamics, boiling heat transfer, building energy efficiency. Currently he has published more than 10 research papers in reputed international journals and 20 international/national conferences.
Arup Kumar Das
Arup Kumar Das is an Associate Professor in the Department of Mechanical and Industrial Engineering at the IIT Roorkee, Uttarakhand, India. He received his M.S. and Ph.D. degrees from the IIT Kharagpur, India. His research contributions are in the two-phase flow and boiling heat transfer. He has published more than 100 research papers in reputed international journals. He is proactive in industrial research and book writing in two-phase flow and heat transfer. He is the recipient of prestigious national fellowship from Indian National Science Academy and Indian National Academy of Engineers.