Multi-jet flows and bubble emission during subcooled nucleate boiling of aqueous n-butanol solution on thin wire

Zhou, Leping; Li, Yuanyuan; Wei, Longting; Du, Xiaoze; Yang, Yongping; Jiang, Pei-Xue; Wang, Bu‐Xuan

doi:10.1016/j.expthermflusci.2014.06.009

Cited by 16 publications

(4 citation statements)

References 28 publications

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“…The boiling experiments were carried out with highly subcooled working fluids with microbubble emission generated in the transition boiling regime. Visualizations of improved wettability of n-butanol aqueous solution compared to water during subcooled pool boiling on a thin wire were numerically confirmed by Zhou et al [20]. The same experimental setup was used in [21], where the effect of nanoparticles and n-butanol on pool boiling was experimentally investigated.…”

Section: Introductionmentioning

confidence: 78%

Heat transfer enhancement of self-rewetting aqueous n-butanol solutions boiling in microchannels

Sitar

Golobič

2015

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 78%

Heat transfer enhancement of self-rewetting aqueous n-butanol solutions boiling in microchannels

Sitar

Golobič

2015

International Journal of Heat and Mass Transfer

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“…The temperature distribution along the wire can affect the interfacial temperature due to the heat conduction between the solid and vapor phases and the evaporation from the liquid layer at a bubble base [11,16] example, Christopher et al [11] proposed a phenomenological model of the temperature distribution around the bubble and the force acting on the bubble. It was concluded that the asymmetric temperature, pressure or surface tension distribution on both sides of the bubble can cause the unusual bubble dynamics.…”

Section: Introductionmentioning

confidence: 99%

Thermocapillary effect on bubble sweeping and circling during subcooled nucleate pool boiling of water over microwire

Zhou

Yang

et al. 2015

International Journal of Heat and Mass Transfer

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“…Although studies on the formation of bubbles by heating alcohol/water mixtures and the behavior of these bubbles have been widely reported, most have used heat sources on the millimeter scale or larger [38][39][40][41][42] . In recent years, several studies have reported on the local heating of alcohol-water mixtures [43][44][45] ; however, systematic studies on convection around bubbles are still lacking.…”

Section: Introductionmentioning

confidence: 99%

(Consideration on knowledge acquisition from optimization result of genetic programming)

Kyoto

2019

The Proceedings of Mechanical Engineering Congress, Japan

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This study investigates the behavior of microbubbles generated by the local heating of an ethanol/water mixture and the surrounding flow. The mixture is photothermally heated by focusing a continuous-wave laser on a FeSi 2 thin film. Although the liquid is not degassed, vapor-rich bubbles are stably generated in an ethanol concentration range of 1.5-50 wt% The vapor-rich bubbles absorb the air dissolved in the surrounding liquid and exhale it continuously as air-rich bubbles ∼ 1 µm in diameter. For the same ethanol concentration range, the solutal-Marangoni force becomes dominant relative to the thermal-Marangoni force, and the air-rich bubbles are pushed away from the high-temperature region in the fluid toward the low-temperature region.Further, it was experimentally demonstrated that Marangoni forces do not significantly affect the surface of vapor-rich bubbles generated in ethanol/water mixtures, and they produce a flow from the high-temperature to the low-temperature region on the vapor-rich bubbles, which moves the exhaled air-rich bubbles away from the vapor-rich bubbles near the heat source. These effects prevent the vapor-rich and exhaled air-rich bubbles from recombining, thereby resulting in the long-term stability of the former. Moreover, the flow produced by the vapor-rich bubbles in the nondegassed 0-20 wt% ethanol/water mixture was stronger than that in degassed water.The maximum flow speed is achieved for an ethanol concentration of 5 wt%, which is 6-11 times higher than that when degassed water is utilized. The ethanol/water mixture produces vapor-rich bubbles without a degassing liquid and enhances the flow speed generated by the vapor-rich bubbles. This flow is expected to apply to driving and mixing microfluids.

show abstract

Multi-jet flows and bubble emission during subcooled nucleate boiling of aqueous n-butanol solution on thin wire

Cited by 16 publications

References 28 publications

Heat transfer enhancement of self-rewetting aqueous n-butanol solutions boiling in microchannels

Heat transfer enhancement of self-rewetting aqueous n-butanol solutions boiling in microchannels

Thermocapillary effect on bubble sweeping and circling during subcooled nucleate pool boiling of water over microwire

(Consideration on knowledge acquisition from optimization result of genetic programming)

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