The effect of sliding bubbles on nucleate boiling of a subcooled liquid flowing in a narrow channel

Ozer, Arif B.; Oncel, Ahmet F.; Hollingsworth, D. Keith; Witte, L. C.

doi:10.1016/j.ijheatmasstransfer.2011.01.010

Cited by 13 publications

(2 citation statements)

References 23 publications

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“…Active control to provide stable operation has been recently proposed [166]; however, research on developing passive techniques would be highly desirable from operational and cost standpoints. Use of infrared imaging provides a valuable tool in evaluating the transient processes inside channels without the need for optically transparent window [182,183].…”

Section: Modeling Of Flow Boiling Heatmentioning

confidence: 99%

History, Advances, and Challenges in Liquid Flow and Flow Boiling Heat Transfer in Microchannels: A Critical Review

Kandlikar

2010

2010 14th International Heat Transfer Conference, Volume 8

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As the scale of devices becomes small, thermal control and heat dissipation from these devices can be effectively accomplished through the implementation of microchannel passages. The small passages provide a high surface area to volume ratio that enables higher heat transfer rates. High performance microchannel heat exchangers are also attractive in applications where space and/or weight constraints dictate the size of a heat exchanger or where performance enhancement is desired. This survey article provides a historical perspective of the progress made in understanding the underlying mechanisms in single-phase liquid flow and two-phase flow boiling processes and their use in high heat flux removal applications. Future research directions for (i) further enhancing the single-phase heat transfer performance, and (ii) enabling practical implementation of flow boiling in microchannel heat exchangers, are outlined.

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Section: Modeling Of Flow Boiling Heatmentioning

confidence: 99%

History, Advances, and Challenges in Liquid Flow and Flow Boiling Heat Transfer in Microchannels: A Critical Review

Kandlikar

2010

2010 14th International Heat Transfer Conference, Volume 8

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“…Thorncroft believed that the reason for this phenomenon is the existence of sliding bubble enhancing the heat transfer. Ozer et al (Ozer et al, 2011) studied the subcooled nucleate boiling in horizontal narrow channel using R-11 and Novec 649. He found that the position where the bubble first nucleated was caused primarily by sliding bubbles.…”

Section: Introductionmentioning

confidence: 99%

Visualized Experiment of Bubble Behaviors in a Vertical Narrow Rectangular Channel Under Natural Circulation Condition

et al. 2018

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The characteristics of bubble behavior have been in particular interest for decades due to its significant contribution to understanding the mechanism of heat transfer. In the present work, visualized experiment is conducted to study the bubble characteristics in subcooled flow boiling of a narrow rectangular channel under natural circulation. The experiments were performed at pressures of 0.2 MPa, with inlet subcooling ranging from 20 to 60 K and heat flux ranging from 100 to 300 kW/m 2 . A high-speed digital camera is used to capture the pictures of bubble behaviors. A sequence of image processing algorithms is used deal with the original bubble images to get relevant bubble parameters. We observe the whole process of a single sliding bubble lifetime and found most of bubbles slide along the heating surface after detaching the nucleation sites. Five typical sliding bubble growth paths are observed in the present experimental conditions. According to the analysis of the experimental data, it can be found that the liquid subcooling and wall superheat are the main factors that affect the bubble size during sliding in narrow rectangular channel under natural circulation condition. Due to the difference of driving force, the sliding velocity of bubble in forced circulation is always larger than that in natural circulation. At the same time, the bubble velocity changes significantly at different heat flux and shooting location.

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Experimental study on visualized flow boiling in a narrow rectangular channel

Han

Liu

Chu

et al. 2022

International Communications in Heat and Mass Transfer

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The effect of sliding bubbles on nucleate boiling of a subcooled liquid flowing in a narrow channel

Cited by 13 publications

References 23 publications

History, Advances, and Challenges in Liquid Flow and Flow Boiling Heat Transfer in Microchannels: A Critical Review

History, Advances, and Challenges in Liquid Flow and Flow Boiling Heat Transfer in Microchannels: A Critical Review

Visualized Experiment of Bubble Behaviors in a Vertical Narrow Rectangular Channel Under Natural Circulation Condition

Experimental study on visualized flow boiling in a narrow rectangular channel

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