Chang, Young Soo Jeong, Kwang-Hun Lee, Heon Ju Lee, Yoon Pyo Kim, Ho-Young 2024-01-20T20:02:44Z 2024-01-20T20:02:44Z 2021-09-05 2010-01 1738-494X https://pubs.kist.re.kr/handle/201004/131814 Thermal bubble formation is a fundamental process in nucleate boiling heat transfer and in many microelectromechanical thermal systems. Here, we report an experimental study of the dynamic and thermal behavior of bubbles generated at a single site, that is, a micro-cavity filled with alumina particles. The thermal process associated with the bubble departure from the isolated cavity, in particular, was shown to be different from that of macroscale boiling. The bubble departure diameter remains constant in a low superheat (or Jakob number) regime which is solely determined by the balance of interfacial tension and buoyancy. In addition, the bubble departure frequency increases along the bubble size as the substrate temperature rises. The further-increased frequency of bubbles emerging from the cavity causes multiple bubbles to coalesce before the preceding bubble completely detaches from the substrate, thus, leading to the decrease of apparent departure frequency with the increase of substrate temperature. English KOREAN SOC MECHANICAL ENGINEERS HEAT-TRANSFER FREQUENCY DIAMETER DYNAMICS SURFACE WATER POOL GAS Behavior of thermal bubbles formed from a single nucleation site Article 10.1007/s12206-009-1112-y 1 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.24, no.1, pp.415 - 420 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY 24 1 415 420 scie scopus kci ART001413885 000273828400083 2-s2.0-77949641870 Engineering, Mechanical Engineering Article; Proceedings Paper HEAT-TRANSFER FREQUENCY DIAMETER DYNAMICS SURFACE WATER POOL GAS Thermal bubble Microcavity Boiling MEMS