Steps towards the development of an experimentally verified simulation of pool nucleate boiling on a silicon wafer with artificial sites

Sanna, Antonio; Karayiannis, Tassos G.; Kenning, D. B. R.; Hutter, C.; Sefiane, Khellil; Walton, A.J.; Golobič, Iztok; Pavlovic, E.; Nelson, Ralph A.

doi:10.1016/j.applthermaleng.2008.05.021

Cited by 18 publications

(4 citation statements)

References 18 publications

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“…In each gravitational orientation, four different contact angles were used, which were = 30°, 45° and 60°, and a detachment case, which started with a contact angle of = 45° until the bubble started to become confined by the opposing wall ( 25ms). Once it started to become confined, the contact angle was gradually reduced to 1° over 20 ms in a method similar to the one used by Sanna, et al [57] to recreate bubble departure.…”

Section: Two-dimensional Resultsmentioning

confidence: 99%

Experimental and Numerical Investigation of Micro/Mini Channel Flow-Boiling Heat Transfer with Non-Uniform Circumferential Heat Fluxes at Different Rotational Orientations

Vermaak

Potgieter

Dirker

et al. 2020

International Journal of Heat and Mass Transfer

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Flow-boiling of Perfluorohexane (FC-72) in horizontal micro/mini channels was investigated experimentally and numerically at different rotational orientations in terms of gravity.One-sided uniform channel heating was considered experimentally for rotational angles ranging from 0° (heating from below) to 180° (heating from above) in increments of 30°. The micro/mini channel had a high aspect ratio of 10 (5 mm x 0.5 mm) and a hydraulic diameter of 909 m. Inchannel flow visualisations were recorded and heat transfer coefficients were determined for mass fluxes of 10, 20 and 40 kg/m 2 s at a saturation temperature of 56 °C. Suitable heat fluxes were applied to span the onset of nucleate boiling to near dry-out conditions within the channel. It was found that the rotational angle had a significant influence on the heat transfer performance due to its influence on bubble detachment. Bottom-heated cases (0° orientation) resulted in local heat transfer coefficients that were up to 201% higher than for any other rotational orientation. Channel orientations of 60° (slanted heating surface) and 90° (heating from the side) generally produced the lowest local heat transfer coefficients. Insight into the influence of the gravitational orientation on single-bubble growth within the nucleation and detachment region was obtained via two-and three-dimensional numerical simulations. Bubble behaviour after detachment and its effect on heat transfer were also investigated transiently until detachment. The numerical simulations mirrored the experimental trends and it was found that the presence of growing bubbles interrupted the velocity streamlines and the thermal boundary layer downstream of the nucleation site.

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Section: Two-dimensional Resultsmentioning

confidence: 99%

Experimental and Numerical Investigation of Micro/Mini Channel Flow-Boiling Heat Transfer with Non-Uniform Circumferential Heat Fluxes at Different Rotational Orientations

Vermaak

Potgieter

Dirker

et al. 2020

International Journal of Heat and Mass Transfer

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“…12 a Loop heat pipe [57]; b Capillary heat pipe [58] examined by Buffone et al [7], Sefiane et al [8] and Hutter et al [9], respectively. Accordingly, certain simulation methods have been experimentally verified for pool nucleate boiling [10]. On the other hand, in the high-power electronic devices, flow boiling in micro-passages is considered as an effective cooling method.…”

Section: Loop Heat Pipes and Capillary Pumped Loopsmentioning

confidence: 99%

Two-Phase Flow and Heat Transfer in Micro-Channels and Their Applications in Micro-System Cooling

Wang

Sefiane

Harmand

et al. 2011

Advanced Structured Materials

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Heat management in high thermal-density systems is confronting rising challenges due to the extremely high heat dissipation capacity requirement in ever more miniaturized and intensified processes. Efforts have been made for heat transfer enhancement. A number of heat transfer technologies including natural convention and radiation, forced convection, pool boiling, micro-channel flow boiling, heat pipes and capillary pumps were introduced. However, the drastically increasing heat transfer requirements are still calling for extensive experimental investigations, especially on the phase change processes in micro-scale. A review of the experimental studies on two-phase flow boiling and heat transfer in small flow passages was presented. Some experimental results published in the year 1993-2010 were overviewed, revealing some controversial conclusions on microscale flow boiling heat transfer mechanisms. Besides, several existing heat transfer correlations were assessed. It should be admitted that the existing database is still limited, especially for flow boiling in passages with unique geometries such as high-aspect-ratio cross section.

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“…It was concluded that a model with consideration of the relaxation time based on unsteady heat conduction could predict the bubble growth and condensation processes in the subcooled pool boiling phenomena. Jiang et al [13] performed a numerical simulation on the bubble growth and heat transfer in nucleate boiling using a hybrid scheme [14] that combined the mechanical boiling model with a computational fluid dynamics (CFD) simulation. However, a similar structure to that from the simulation of Stephan et al [9] was adopted for the liquid film between the bubble and heat transfer surface.…”

Section: Introductionmentioning

confidence: 99%

On heat transfer and evaporation characteristics in the growth process of a bubble with microlayer structure during nucleate boiling

Chen

Utaka

2015

International Journal of Heat and Mass Transfer

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We have previously observed and experimentally measured a microlayer formed beneath a growing bubble during nucleate pool boiling. The initial microlayer thickness was of micrometer order and increased linearly with distance from the bubble inception site. The quantitative degree of contribution of the microlayer evaporation to bubble growth was still not elucidated, although a large number of experimental studies have been conducted on the distribution and evaporation characteristics of the microlayer. To clarify the heat transfer characteristics, especially the contribution of microlayer evaporation in nucleate pool boiling, numerical simulations are performed here for two phase vapor-liquid flow induced by the growth of a single bubble using the volume of fluid method. Furthermore, a special model is proposed to combine the microlayer and bulk liquid regions, the scales of which are extremely different in the simulations. The microlayer was neglected in the volume fraction calculation, while the evaporation from the microlayer was included by applying the source terms of the basic equations for the presence of a virtual microlayer. Similar tendencies were observed between the calculated and experimental results on the variations in the microlayer radius and bubble volume. The proportion of microlayer evaporation to total bubble volume was generally in agreement with the previous results, and the ratio of microlayer evaporation to the change in the total bubble volume was approximately 40 percent.

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Steps towards the development of an experimentally verified simulation of pool nucleate boiling on a silicon wafer with artificial sites

Cited by 18 publications

References 18 publications

Experimental and Numerical Investigation of Micro/Mini Channel Flow-Boiling Heat Transfer with Non-Uniform Circumferential Heat Fluxes at Different Rotational Orientations

Experimental and Numerical Investigation of Micro/Mini Channel Flow-Boiling Heat Transfer with Non-Uniform Circumferential Heat Fluxes at Different Rotational Orientations

Two-Phase Flow and Heat Transfer in Micro-Channels and Their Applications in Micro-System Cooling

On heat transfer and evaporation characteristics in the growth process of a bubble with microlayer structure during nucleate boiling

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