Experimental study on bubble departure characteristics in subcooled nucleate pool boiling

Goel, Parul; Nayak, Arun K.; Kulkarni, Parimal P.; Joshi, Jyeshtharaj B.

doi:10.1016/j.ijmultiphaseflow.2016.10.012

Cited by 52 publications

(12 citation statements)

References 42 publications

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“…[11]. The bubble dynamics in nanofluids are studied experimentally and introduced by some efforts of researchers [5,[12][13][14][15]. Park et al [12] attempted to formulate the problem of bubble dynamics in nanofluids and find experimentally the behaviours of boiling bubbles.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Transfer on the Growing Bubble with the Nanoparticles/Water Nanofluids in Turbulent Flow

Abu‐Nab¹,

Abu-Bakr²

2021

MMEP

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This paper is devoted to study the effect of heat transfer on the temperature distribution in a superheated liquid during the growth of vapour bubbles immersed in different types of nanoparticles/water nanofluids between two-phase turbulent flow. The mathematical model is formulated and solved analytically depending on Scriven's theory and using the modification of the method of the similarity parameters between two finite boundaries. The characteristics of vapour bubble growth and temperature distribution are obtained by using the thermo-physical properties of nanoparticles nanofluids. The results indicate that the nanoparticle volume concentration reduces the bubble growth process under the effect of heat transfer. The better agreements are achieved, for bubble dynamics in turbulent nanofluid using the appropriate numerical and theoretical data for the values of concentration rate of nanoparticles χ=0,0.2,0.4. The temperature distribution surrounding the regime of bubble growth in pure water is more intensive than in other cases of Al2O3/H2O, Fe3O4/H2O and CuO/H2O nanofluids in turbulent flow. A Comparison of the current solution with previous works is carried out and discussed.

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Section: Introductionmentioning

confidence: 99%

Effect of Heat Transfer on the Growing Bubble with the Nanoparticles/Water Nanofluids in Turbulent Flow

Abu‐Nab¹,

Abu-Bakr²

2021

MMEP

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“…Specifically, bubbles of a similar size were reported at high heat fluxes and low subcooling in boiling water on large horizontal flat heaters on Earth (L h /L c ≥1). 26 – 30 They formed via vigorous lateral coalescence among small bubbles and departed from the heater in less than ~ 0.1–0.3 s. In parabolic flights, bubble liftoff diameters from about 2 mm to 20 mm were observed in boiling water on flat heaters for L h /L c ~ 1.8 31 and ~ 3.7. 32 However, these bubbles formed, grew and departed in about 10–12 s. Depending on the level of subcooling, several different modes of boiling water on thin horizontal wires were observed in experiments on Earth 33 – 41 for L h /L c ~ 0.0046−0.370, and in drop towers and parabolic flights 42 – 44 for L h /L c ~ 0.0009−0.0030, where L h is the wire radius: large bubble boiling, coexisting boiling, and explosive small bubble boiling.…”

Section: Resultsmentioning

confidence: 99%

Single-bubble water boiling on small heater under Earth’s and low gravity

et al. 2018

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Today’s trends for enhancing boiling heat transfer in terrestrial and space applications focus on removal of bubbles to prevent formation of a vapor layer over the surface at high overheat. In contrast, this paper presents a new boiling regime that employs a vapor–air bubble residing on a small heater for minutes and driving cold water over the surface to provide high heat flux. Single-bubble boiling of water was investigated under normal gravity and low gravity in parabolic flights. Experiments demonstrated a negligible effect of gravity level on the rate of heat transfer from the heater. Due to self-adjustment of the bubble size, the heat flux provided by boiling rose linearly up with increasing heater temperature and was not affected by a gradually rising water temperature. The fast response and stable operation of single-bubble boiling over a broad range of temperatures pave the way for development of new devices to control heat transfer by forming surface domains with distinct thermal properties and wettability. The bubble lifetime can be adjusted by changing the water temperature. The ability of heating water on millimeter scales far above 100 °C without an autoclave or a powerful laser provides a new approach for processing of biomaterials and chemical reactions.

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“…According to the study, a bubble with the spherical shape of millimetre size changes to the mushroom shape of a few centimetres size in the sub atmospheric pressure. Goel et al [2017] had attempted to study the effect of various surface properties like roughness and inclination angle on bubble behaviour. They used the bubble departure diameters and frequencies to calculate the nucleate boiling heat flux by using some empirical relations derived from their experiments in the subcooled range up to 20 K. Hao et al [2005] and Lu and Peng [2006] heated a micro-wire in the subcooled water (40 -60 K) and reported the leaping and slipping of bubbles.…”

Section: Experimental Studies On Pool Boilingmentioning

confidence: 99%

Subcooled Pool Boiling on Ultra-thin Strips of Varying Cross-sections

Birhmana¹,

Sanjid²,

Pintoa³

et al. 2019

JEES

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The Boiling heat transfer phenomenon can be used for effectively cooling microelectronic chips. However, since these systems belong to such small length scales, and are in various shapes and sizes, the boiling phenomenon will be different from that observed in macro systems. The present study looks into the fundamental similarities/differences in the phenomenon by studying the growth of bubbles on ultra-thin strips. An experimental investigation is conducted to generate bubbles of various sizes on a unique double dog-bone shaped thin substrate. The growth and departure of the bubble generated on various sections of the substrate were studied. The bubbles observed on these different sections of an identical substrate were found to have considerable interdependency. Additionally, data generated is for very high subcooling that is not available in the literature. Bubble growth and departure model was developed, and preliminary results indicate improved bubble departure prediction capabilities across a wide range of subcooling.

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Experimental study on bubble departure characteristics in subcooled nucleate pool boiling

Cited by 52 publications

References 42 publications

Effect of Heat Transfer on the Growing Bubble with the Nanoparticles/Water Nanofluids in Turbulent Flow

Effect of Heat Transfer on the Growing Bubble with the Nanoparticles/Water Nanofluids in Turbulent Flow

Single-bubble water boiling on small heater under Earth’s and low gravity

Subcooled Pool Boiling on Ultra-thin Strips of Varying Cross-sections

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