@Article{cmes.2023.026657, AUTHOR = {Ningbo Guo, Xianming Gao, Duanling Li, Jixing Zhang, Penghui Yin, Mengyi Hua}, TITLE = {Experimental and Numerical Analysis of the Influence of Microchannel Size and Structure on Boiling Heat Transfer}, JOURNAL = {Computer Modeling in Engineering \& Sciences}, VOLUME = {136}, YEAR = {2023}, NUMBER = {3}, PAGES = {3061--3082}, URL = {http://www.techscience.com/CMES/v136n3/51818}, ISSN = {1526-1506}, ABSTRACT = {Computational fluid dynamics was used and a numerical simulation analysis of boiling heat transfer in microchannels with three depths and three cross-sectional profiles was conducted. The heat transfer coefficient and bubble generation process of three microchannel structures with a width of 80 μm and a depth of 40, 60, and 80 μm were compared during the boiling process, and the factors influencing bubble generation were studied. A visual test bench was built, and test substrates of different sizes were prepared using a micro-nano laser. During the test, the behavior characteristics of the bubbles on the boiling surface and the temperature change of the heated wall were collected with a high-speed camera and a temperature sensor. It was found that the microchannel with a depth of 80 μm had the largest heat transfer coefficient and shortest bubble growth period, the rectangular channel had a larger peak heat transfer coefficient and a lower frequency of bubble occurrence, while the V-shaped channel had the shortest growth period, i.e., the highest frequency of bubble occurrence, but its heat transfer coefficient was smaller than that of the rectangular channel.}, DOI = {10.32604/cmes.2023.026657} }