Experimental Evidence of the Vapor Recoil Mechanism in the Boiling Crisis

Nikolayev, Vadim; Chatain, D.; Garrabos, Yves; Beysens, Daniel

doi:10.1103/physrevlett.97.184503

Cited by 103 publications

(86 citation statements)

References 14 publications

(25 reference statements)

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“…Therefore, higher hydrophobicity (i.e., larger contact angle) hinders the bubble departure and thus facilitates the transition from nucleate boiling into film boiling. This is consistent with the vapor recoil theory for the boiling transition [5,13]. Moreover, the insets of Fig.…”

Section: B Bubble Departure Under Gravitysupporting

confidence: 78%

“…Physically, the larger the bubble base length, the stronger the bubble adhesion to the substrate, and hence the larger the bubble volume is required for departure. We also investigate the effects of surface superheating on the bubble dynamics with similar findings that can be interpreted using the temperature dependence of contact angle [13,34,44].…”

Section: Discussionmentioning

confidence: 92%

“…• due to the significant surface superheating [13,44]. The liquid-to-vapor transition is localized in the close vicinity of the contact line over the length scale of interfacial thickness (≈3 ) [33,34].…”

Section: A Bubble Growth Under Zero Gravitymentioning

confidence: 99%

“…However, the competition between lateral bubble spreading and vertical bubble departure, which is an important characteristic of pool boiling under gravity, has not been addressed and systematically investigated. The outcome of this competition is essential to the triggering of boiling crisis and to the transition from nucleate boiling to film boiling regime [12,13]. One of the main purposes of the present work is to employ the DVDWT to investigate the competition between lateral bubble spreading and vertical bubble departure in saturated pool boiling.…”

Section: Introductionmentioning

confidence: 99%

“…(ii) The mechanism underlying the boiling crisis remains controversial [5,[11][12][13]. The boiling crisis occurs at the CHF, marking the transition from nucleate boiling to transition boiling and eventually to film boiling.…”

Section: Introductionmentioning

confidence: 99%

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Single-bubble dynamics in pool boiling of one-component fluids

Qian

2014

Phys. Rev. E

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We numerically investigate the pool boiling of one-component fluids with a focus on the effects of surface wettability on the single-bubble dynamics. We employed the dynamic van der Waals theory [Phys. Rev. E 75, 036304 (2007)], a diffuse-interface model for liquid-vapor flows involving liquid-vapor transition in nonuniform temperature fields. We first perform simulations for bubbles on homogeneous surfaces. We find that an increase in either the contact angle or the surface superheating can enhance the bubble spreading over the heating surface and increase the bubble departure diameter as well and therefore facilitate the transition into film boiling. We then examine the dynamics of bubbles on patterned surfaces, which incorporate the advantages of both hydrophobic and hydrophilic surfaces. The central hydrophobic region increases the thermodynamic probability of bubble nucleation while the surrounding hydrophilic region hinders the continuous bubble spreading by pinning the contact line at the hydrophobic-hydrophilic intersection. This leads to a small bubble departure diameter and therefore prevents the transition from nucleate boiling into film boiling. With the bubble nucleation probability increased and the bubble departure facilitated, the efficiency of heat transfer on such patterned surfaces is highly enhanced, as observed experimentally [Int. J. Heat Mass Transfer 57, 733 (2013)]. In addition, the stick-slip motion of contact line on patterned surfaces is demonstrated in one-component fluids, with the effect weakened by surface superheating.

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Section: B Bubble Departure Under Gravitysupporting

confidence: 78%

Section: Discussionmentioning

confidence: 92%

Section: A Bubble Growth Under Zero Gravitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Single-bubble dynamics in pool boiling of one-component fluids

Qian

2014

Phys. Rev. E

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Reduced Graphene Oxide–Based Spectrally Selective Absorber with an Extremely Low Thermal Emittance and High Solar Absorptance

et al. 2020

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Carbon‐based black materials exhibit strong solar absorptance (αsolar >0.90), which play key roles in transforming solar energy into available power for solar‐thermal, thermophotovoltaic, thermoelectric, and many other systems. However, because of high thermal emittance (>95%), these carbon‐based materials always cause huge energy loss that hinders the solar‐thermal conversion efficiency tremendously. In this study, a reduced graphene oxide–based spectrally selective absorber (rGO‐SSA) is demonstrated, which possesses a recorded low thermal emittance (≈4%) and high solar absorptance (αsolar ≈ 0.92) by easily regulating the reduction level of inner 2D graphene sheets. Compared to conventional carbon‐based black materials, thermal emittance of this rGO‐SSA is largely reduced by ≈95.8% and the cutoff wavelength of rGO‐SSA is broadband‐tunable that can range from 1.1 to 3.2 µm. More importantly, this simply sol‐gel coated rGO‐SSA has high temperature tolerance at 800 °C for 96 h that is hardly achieved by other cermet‐based or photonic‐based SSAs. Based on this rGO‐SSA, ultrafast solar steam escape (0.94 mg cm−2 s−1) under concentrated solar irradiance is achieved directly. The insight from this study will provide a new strategy for constructing thermally stable carbon‐based SSAs and greatly facilitate the solar‐thermal practical significance.

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Conduction‐Dominated Cryomesh for Organism Vitrification

Guo,

Zuchowicz,

Bouwmeester

et al. 2023

Advanced Science

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Vitrification‐based cryopreservation is a promising approach to achieving long‐term storage of biological systems for maintaining biodiversity, healthcare, and sustainable food production. Using the “cryomesh” system achieves rapid cooling and rewarming of biomaterials, but further improvement in cooling rates is needed to increase biosystem viability and the ability to cryopreserve new biosystems. Improved cooling rates and viability are possible by enabling conductive cooling through cryomesh. Conduction‐dominated cryomesh improves cooling rates from twofold to tenfold (i.e., 0.24 to 1.2 × 105 °C min−1) in a variety of biosystems. Higher thermal conductivity, smaller mesh wire diameter and pore size, and minimizing the nitrogen vapor barrier (e.g., vertical plunging in liquid nitrogen) are key parameters to achieving improved vitrification. Conduction‐dominated cryomesh successfully vitrifies coral larvae, Drosophila embryos, and zebrafish embryos with improved outcomes. Not only a theoretical foundation for improved vitrification in µm to mm biosystems but also the capability to scale up for biorepositories and/or agricultural, aquaculture, or scientific use are demonstrated.

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Experimental Evidence of the Vapor Recoil Mechanism in the Boiling Crisis

Cited by 103 publications

References 14 publications

Single-bubble dynamics in pool boiling of one-component fluids

Single-bubble dynamics in pool boiling of one-component fluids

Reduced Graphene Oxide–Based Spectrally Selective Absorber with an Extremely Low Thermal Emittance and High Solar Absorptance

Conduction‐Dominated Cryomesh for Organism Vitrification

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