Nucleate Pool Boiling eXperiment (NPBX) in microgravity: International Space Station

Warrier, Gopinath R.; Dhir, Vijay K.; Chao, David F.

doi:10.1016/j.ijheatmasstransfer.2014.12.054

Cited by 52 publications

(10 citation statements)

References 25 publications

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“…For instance there are open questions on the quantitative impact of the gravity level on the critical heat flux and more in general on the heat transfer behaviour [1,2]. Moreover, the impact of wall superheat and wetting properties, that have been largely investigated in normal gravity conditions, are not clearly understood in micro-gravity conditions [3,4]. Therefore basic studies, dealing with single bubbles, are required to improve our understanding.…”

Section: Introductionmentioning

confidence: 99%

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Direct numerical simulation of nucleate boiling in zero gravity conditions

Urbano

Tanguy

Colin

2019

International Journal of Heat and Mass Transfer

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Understanding and controlling nucleate pool boiling phenomena in zero gravity conditions is fundamental for space applications. An analytical model for the equilibrium radius reached by a bubble nucleated in sub-cooled conditions is established in this work and verified numerically. Indeed, direct numerical simulations of two phase flows conjugated with the heat conduction in the solid wall are carried out in order to verify and correct the analytical model. Fine grids, with cells size of the order of the micron, are mandatory in order to capture the subtle equilibrium between condensation and evaporation that characterises stationary conditions. This has been possible thanks to the house made solver DIVA, validated for nucleate pool boiling simulations, and that permits to carry out parallel numerical simulations. Results show that the equilibrium radius of the bubble is a function of the thermal gradient, of the Jakob numbers associated with condensation and evaporation and of the apparent contact angle. The analysis of the thermal field is carried out and an interpretation of the physical processes that characterise the equilibrium is given. In addition, useful information on the heat transfer behaviour, reported in terms of Nu numbers, completes the work.

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Section: Introductionmentioning

confidence: 99%

“…The gravity acceleration never reaches a zero value, but typically a minimum value that varies between 10 À2 et 10 À6 g [8,9,7,10,2]. To achieve longer times and lower gravity levels down to 10 À7 g, orbital flights must be considered, onboard a space station for instance, but these experiments are rare and expensive [11,3].…”

Section: Introductionmentioning

confidence: 99%

Direct numerical simulation of nucleate boiling in zero gravity conditions

Urbano

Tanguy

Colin

2019

International Journal of Heat and Mass Transfer

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“…Until now, many experimental studies on passive technologies, such as mixture fluid [1], nanofluids [2][3][4][5], surface modification [6,7], and simulation work [8] in relation to passive technologies have been performed to enhance pool boiling heat transfer. Meanwhile, pool boiling in different gravity conditions has been investigated in the last decade by numerous researchers [9][10][11][12][13][14][15], and there are many review papers regarding pool boiling in microgravity [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of subcooled flow boiling heat transfer on micro-pin-finned surfaces in short-term microgravity

Liu

Zhao

Deng

et al. 2018

Experimental Thermal and Fluid Science

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“…Most recently, Warrier et al (2015) conducted a series of nucleate pool boiling experiments (NPBX) aboard the International Space Station (ISS). Five cylindrical micro-cavities were formed on the surface to initiate nucleate boiling.…”

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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Nucleate Pool Boiling eXperiment (NPBX) in microgravity: International Space Station

Cited by 52 publications

References 25 publications

Direct numerical simulation of nucleate boiling in zero gravity conditions

Direct numerical simulation of nucleate boiling in zero gravity conditions

Experimental study of subcooled flow boiling heat transfer on micro-pin-finned surfaces in short-term microgravity

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

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