Hybrid atomistic-continuum simulation of nucleate boiling with a domain re-decomposition method

Zhang, Bo; Mao, Yijin; Chen, Chung‐Lung; Zhang, Yuwen

doi:10.1080/10407790.2016.1277916

Cited by 8 publications

(2 citation statements)

References 42 publications

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“…As soon as the growing bubble penetrates HS interface, the VOF method switches on. Another path is followed by Zhang et al [73] who accommodate the position of HS interface according to the location of the phase-change interface. In this way, the entire bubble growth is computed by MD simulations, while CFD is applied to compute liquid-flow containing larger length scales.…”

Section: Figure 3 Illustration Of Boiling Length Scales and Mechanismentioning

confidence: 99%

Boiling heat transfer modelling: A review and future prospectus

Ilić¹,

Petrović

Stevanović

2019

Therm sci

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This paper reviews the current status of boiling heat transfer modelling, discusses the need for its improvement due to unresolved intriguing experimental findings and emergence of novel technical applications and outlines the directions for an advanced modelling approach. The state-of-the-art of computational boiling heat transfer studies is given for: macro-scale boiling models applied in two-fluid liquid-vapour interpenetrating media approach, micro-, meso-scale boiling computations by interface capturing methods, and nano-scale boiling simulations by molecular dynamics tools. Advantages, limitations and shortcomings of each approach, which originate from its grounding formulations, are discussed and illustrated on results obtained by the boiling model developed in our research group. Based on these issues, we stress the importance of adaptation of a multi-scale approach for development of an advanced boiling predictive methodology. A general road-map is outlined for achieving this challenging goal, which should include: improvement of existing methods for computation of boiling on different scales and development of conceptually new algorithms for linking of individual scale methods. As dramatically different time steps of integration for different boiling scales hinder the application of full multi-scale methodology on boiling problems of practical significance, we emphasise the importance of development of another algorithm for the determination of sub-domains within a macro-scale boiling region, which are relevant for conductance of small-scale simulations.

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Section: Figure 3 Illustration Of Boiling Length Scales and Mechanismentioning

confidence: 99%

Boiling heat transfer modelling: A review and future prospectus

Ilić¹,

Petrović

Stevanović

2019

Therm sci

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“…Mechanistic models of the single bubbles have been devised to capture the growth of a bubble from an assumed 'seed' of vapour located at the heat transfer surface. The bubble nucleation and early formation processes are outside the remit of these methods, which need to be augmented via coupling with molecular mechanics [72] simulation in order to develop self-consistent models of the nucleation cycle. Nevertheless, use of nucleate boiling simulation from a pre-set seed of vapour enabled prediction and experimental validation of bubble growth in pressurized water close to typical reactor operation conditions [71].…”

Section: Computation Of Bubble Departure Diameters and Frequenciesmentioning

confidence: 99%

Modelling of Boiling Flows for Nuclear Thermal Hydraulics Applications—A Brief Review

Giustini

2020

Inventions

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The boiling process is utterly fundamental to the design and safety of water-cooled fission reactors. Both boiling water reactors and pressurised water reactors use boiling under high-pressure subcooled liquid flow conditions to achieve high surface heat fluxes required for their operation. Liquid water is an excellent coolant, which is why water-cooled reactors can have such small sizes and high-power densities, yet also have relatively low component temperatures. Steam is in contrast a very poor coolant. A good understanding of how liquid water coolant turns into steam is correspondingly vital. This need is particularly pressing because heat transfer by water when it is only partially steam (‘nucleate boiling’ regime) is particularly effective, providing a great incentive to operate a plant in this regime. Computational modelling of boiling, using computational fluid dynamics (CFD) simulation at the ‘component scale’ typical of nuclear subchannel analysis and at the scale of the single bubbles, is a core activity of current nuclear thermal hydraulics research. This paper gives an overview of recent literature on computational modelling of boiling. The knowledge and capabilities embodied in the surveyed literature entail theoretical, experimental and modelling work, and enabled the scientific community to improve its current understanding of the fundamental heat transfer phenomena in boiling fluids and to develop more accurate tools for the prediction of two-phase cooling in nuclear systems. Data and insights gathered on the fundamental heat transfer processes associated with the behaviour of single bubbles enabled us to develop and apply more capable modelling tools for engineering simulation and to obtain reliable estimates of the heat transfer rates associated with the growth and departure of steam bubbles from heated surfaces. While results so far are promising, much work is still needed in terms of development of fundamental understanding of the physical processes and application of improved modelling capabilities to industrially relevant flows.

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Review on numerical simulation of boiling heat transfer from atomistic to mesoscopic and macroscopic scales

Chen,

Yu,

et al. 2024

International Journal of Heat and Mass Transfer

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Hybrid atomistic-continuum simulation of nucleate boiling with a domain re-decomposition method

Cited by 8 publications

References 42 publications

Boiling heat transfer modelling: A review and future prospectus

Boiling heat transfer modelling: A review and future prospectus

Modelling of Boiling Flows for Nuclear Thermal Hydraulics Applications—A Brief Review

Review on numerical simulation of boiling heat transfer from atomistic to mesoscopic and macroscopic scales

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