Study of bubble growth in water pool boiling through synchronized, infrared thermometry and high-speed video

Gerardi, C.; Buongiorno, Jacopo; Hu, Lin‐Wen; McKrell, Thomas

doi:10.1016/j.ijheatmasstransfer.2010.05.041

Cited by 275 publications

(129 citation statements)

References 18 publications

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“…In the growth stage of vapor bubble the regions with different heat transfer mechanism (microlayer region and area of dry spot in the center of nucleation site) appear. The boundary between different heat transfer modes is the triple contact line [2][3][4][5][6]. The area with a minimal temperature of the heater surface corresponds to microlayer region.…”

Section: Resultsmentioning

confidence: 99%

“…With the use of PIV technique authors [5] analyzed the hydrodynamics of microflows at bubble appearance, growth and detachment from the surface. In recent years, a general method to study the evolution of temperature field under single vapor bubble is the high-speed infrared thermometry (IR) [3][4][5][6][7][8][9]. This technique allows to investigate not only integral heat transfer but also the main local characteristics at boiling such as nucleation site density, nucleation frequency, local heat transfer under vapor bubble, etc.…”

Section: Introductionmentioning

confidence: 99%

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Study of thermal behavior of microlayer under vapor bubble at liquid boiling

2017

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Abstract. The results of experimental study of evolution of temperature fields under single vapor bubble obtained by high-speed infrared thermometry with high spatial resolution (13 m) are presented in this paper. The data were obtained at pool boiling of saturated ethanol and deionized water at atmospheric pressure. Reconstruction of local instantaneous heat flux distribution on the heater surface was carried out with the use of numerical simulation. It is shown that maximal local heat flux was observed in the microlayer region on the bubble growth stage and reached the value an order of magnitude greater than the input heat flux. Based on the results of experimental and numerical researches the estimations of the microlayer thickness were carried out at pool boiling of water and ethanol, which are in good agreement with the experimental data presented in the literature and obtained using laser interferometry.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of thermal behavior of microlayer under vapor bubble at liquid boiling

2017

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“…DEPIcT from the now-established IR thermometry technique with IR-opaque heaters (5/23) [Theofanous et al 2002, Wagner and Stephan 2009, Gerardi et al 2010, Kim et al 2012, where the temperature measured is the temperature of the surface, which makes it hard to identify phases on the surface conclusively.…”

Section: Description Of the Depict Techniquementioning

confidence: 99%

Measurement of wetted area fraction in subcooled pool boiling of water using infrared thermography

Kim

Park

Buongiorno

2013

Nuclear Engineering and Design

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The wetted area fraction in subcooled pool boiling of water at atmospheric pressure is measured using the DEPIcT (DEtection of Phase by Infrared Thermography) technique. DEPIcT exploits the contrast in infrared (IR) light emissions between wet and dry areas on the surface of an IRtransparent heater to visualize the instantaneous distribution of the liquid and gas phases in contact with the heater surface. In this paper time-averaged wetted area fraction data in nucleate boiling are reported as functions of heat flux (from 30% up to 100% of the Critical Heat Flux) and subcooling (T sub = 0, 5, 10, 30 and 50C). The results show that the wetted area fraction monotonically decreases with increasing heat flux and increases with increasing subcooling: both trends are expected. The range of time-averaged wetted area fractions is from 90%, at low heat flux and high subcooling, to 50% at high heat flux (right before CHF) and low subcooling. It is also shown that the dry areas are periodically rewetted by liquid sloshing on the surface at any subcooling and heat flux; however, the dry areas expand irreversibly at CHF.

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“…Using a high-speed infrared camera, Gerardi et al (2010) showed that the largest enthalpy required for bubble growth is transferred by microlayer evaporation during the saturated boiling of water. Gao et al (2012) also measured dynamic characteristics of the microlayer beneath an ethanol vapor bubble by using high-speed camera technique and laser interferometric method, while more recently Jung and Kim (2014) measured simultaneously the microlayer shape beneath a de-ionized water vapor bubble by using total internal reflection technique and the temperature distribution on the heating surface by a high-speed, high-resolution infrared thermometry.…”

Section: Introductionmentioning

confidence: 99%

Partial Nucleate Pool Boiling at Low Heat Flux: Preliminary Ground Test for SOBER-SJ10

Zhao

et al. 2016

Microgravity Sci. Technol.

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Focusing on partial nucleate pool boiling at low heat flux, SOBER-SJ10, one of 27 experiments of the program SJ-10, has been proposed to study local convection and heat transfer around an isolated growing vapor bubble during nucleate pool boiling on a well characterized flat surface in microgravity. An integrated micro heater has been developed. By using a local pulse overheating method in the experimental mode of single bubble boiling, a bubble nucleus can be excited with accurate spatial and temporal positioning on the top-side of a quartz glass substrate with a thickness of 2 mm and an effective heating area of 4.5 mm in diameter, and then grows under an approximate constant heat input provided by the main heater on the back-side of the substrate. Ten thin film micro-RTDs are used for local temperature measurements on the heating surface underneath the growing bubble. Normal pool boiling experiments can also be carried out with step-by-step increase of heating voltage. A series of ground test of the flight module of SOBER-SJ10 have been conducted. Good agreement of the measured data of single phase natural convection with the common-used empirical correlation warrants reasonable confidence in the data. It is found that the values of the incipience superheat of pool boiling at different subcooling are consistent with each others, verifying that the influence of subcooling on boiling incipience can be neglected. Pool

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Study of bubble growth in water pool boiling through synchronized, infrared thermometry and high-speed video

Cited by 275 publications

References 18 publications

Study of thermal behavior of microlayer under vapor bubble at liquid boiling

Study of thermal behavior of microlayer under vapor bubble at liquid boiling

Measurement of wetted area fraction in subcooled pool boiling of water using infrared thermography

Partial Nucleate Pool Boiling at Low Heat Flux: Preliminary Ground Test for SOBER-SJ10

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