RT Journal Article ID 669b2f9c052a2ebf A1 Ma, Xuehu A1 Xu, Wei A1 Yu, Chunjian A1 Lan, Zhong A1 Hao, Zhaolong T1 TEMPERATURE FLUCTUATION CHARACTERISTICS OF POOL BOILING WITHIN SPACE-CONFINED STRUCTURES JF Heat Transfer Research JO HTR YR 2016 FD 2016-02-10 VO 47 IS 3 SP 243 OP 258 K1 pool boiling K1 space-confined structure K1 temperature fluctuation K1 heat transfer enhancement K1 liquid microlayer AB In this paper, the surface temperature fluctuation magnitude and frequency at the nucleation sites in the process of boiling a specially designed space-confined structure is investigated using infrared thermography. Water and ethanol are used as working fluids. The results show that the magnitude of temperature fluctuations is less than 1 K in experiments, while the theoretical prediction of this value is equal to at least 5 K if bubbles are in direct contact with the heating surface. The average temperature fluctuation frequencies and the average bubble departure frequencies on plain and E0.15 surfaces are close in value to each other. A remarkable discrepancy can be found between the surface temperature fluctuation frequency and the bubble departure frequency. The experimental results illustrate that bubbles are not in direct contact with the heating surface, instead, a microlayer of liquid exists between bubbles and heating surface all the time. The bubbles predominately affect the boiling heat transfer characteristics through the temperature fluctuation of the liquid layer. PB Begell House LK https://www.dl.begellhouse.com/journals/46784ef93dddff27,5b3a89a460f279bf,669b2f9c052a2ebf.html