Gravity effects on subcooled flow boiling heat transfer

Lebon, Michel T.; Hammer, Caleb F.; Kim, Jungho

doi:10.1016/j.ijheatmasstransfer.2018.09.011

Cited by 43 publications

(7 citation statements)

References 15 publications

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“…Figure 4 provides details for the subcooled flow-boiling simulation which was designed to replicate experiments performed at different gravity levels by Lebon et al [34]. These computations used the multiphase incompressible Navier-Stokes solver along with the phase transition capability, and were preformed at a resolution almost twice the previous state-of-the-art [35,28].…”

Section: Illustrative Examplesmentioning

confidence: 99%

Flash-X: A multiphysics simulation software instrument

et al. 2022

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Section: Illustrative Examplesmentioning

confidence: 99%

Flash-X: A multiphysics simulation software instrument

et al. 2022

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“…However, to study specific parameters like nucleation frequency, distribution of the active nucleation sites, bubble growth characteristics and local heat fluxes, the transient wall temperatures on the boiling surface should be determined. This can be achieved using the liquid crystals [179,180], microthermocouple arrays [181,182], temperature sensitive paints [183,184], fluorescence microscopy [69] or infrared (IR) thermometry [30,[70][71][72]185,186].…”

Section: Experimental Boiling Performance Determinationmentioning

confidence: 99%

Laser Surface Engineering for Boiling Heat Transfer Applications

Zupančič

Gregorčič

2021

Materials With Extreme Wetting Properties

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Nucleate boiling is inseparably connected with our everyday life. It is not only utilized in simple tasks like cooking, but it is also important for applications on various scales, ranging from enormous nuclear power plants to miniature microelectronics. This widespread integration is the result of its ability for effective heat transfer at low temperature differences between the heated surface and the surrounding fluid. The surface wettability undoubtedly influences the boiling heat transfer, but the observed behaviour cannot be explained without taking into account the surface topography and chemical modifications due to intense boiling processes. This chapter demonstrates how nucleate boiling enhancement can be achieved on surfaces with various wetting properties and specific micro/nano topographical features, fabricated using a straightforward, robust and scalable laser texturing approach. We discuss the basics of nucleate boiling and how it is affected by surface wettability; provide a fundamental background of laser surface engineering and its ability to achieve extreme wetting properties; and finally demonstrate the applicability of the laser-textured surfaces in enhancing and controlling nucleate pool boiling of different fluids. We show how laser surface engineering decreases the wettability effects on the key boiling parameters andin this wayensures more stable heat transfer performance.

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“…R134a is considered as the most promising refrigerant used in spacecraft attributed to its relatively low working pressure [7], but the discharge pressure of compressor still exceeds 10 bar. Moreover, compared to terrestrial conditions, the two-phase heat transfer intensity is deteriorated under microgravity as the development of thermal boundary layer is restrained [8,9].…”

Section: Enlarging Applicable Temperature Range By Thermoelectric Coolermentioning

confidence: 99%

Modular integrated thermal control system in scientific experimental express rack on space station

et al. 2020

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As an important mission of space stations, space science experiment usually requires effective temperature control measures. Scientific experimental express rack (ER) is a general design for space science experiment. In some space scientific experiments, the temperature of local target element or surrounding exceed heat sink temperature range, effective heating and cooling measures are required. Thermoelectric cooler (TEC) has high reliability and low complexity, which is applicable for temperature control in low gravity conditions. In the ER, the entire surrounding is indirectly heated or cooled by the ambient air, local target element surface is heated or cooled by liquid, TEC is thermal competent for ER thermal control attributed to the low complexity and high reliability, which can enlarge the temperature range of air and liquid. In this paper, a modular integrated thermal control system (MITCS) is designed for a specific ER, which has liquid assembly (LA), TEC assembly (TECA), heat exchanger assembly (HXA) and air cycle assembly (ACA) to provide target surface cooling and heating, entire surrounding cooling and heating. The thermal performance of MITCS using TEC are analyzed, providing guides for the design of the scientific experimental ER and other thermal systems.

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Gravity effects on subcooled flow boiling heat transfer

Cited by 43 publications

References 15 publications

Flash-X: A multiphysics simulation software instrument

Flash-X: A multiphysics simulation software instrument

Laser Surface Engineering for Boiling Heat Transfer Applications

Modular integrated thermal control system in scientific experimental express rack on space station

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