A critical comparison of smooth and sharp interface methods for phase transition

Rajkotwala, A.H.; Panda, A.; Peters, E.A.J.F.; Geld, C.W.M. van der; Kuerten, Johannes G.M.; Kuipers, J.A.M.

doi:10.1016/j.ijmultiphaseflow.2019.103093

Cited by 22 publications

(17 citation statements)

References 34 publications

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“…This test case has been simulated by Tanguy et al [85] on two-dimensional axisymmetric cartesian grids and by Rajkotwala et al [67] on three-dimensional cartesian grids. Our goal is to reproduce similar results in order to validate our numerical method on three-dimensional unstructured grids.…”

Section: Numerical Results In 3dmentioning

confidence: 99%

“…To this purpose, DNS of nucleate boiling are proposed in which the heat conduction in the solid wall is taken into account. Also in 2019, Rajkotwala et al [67] provided a comparison of smooth and sharp interface methods for numerical simulations of two-phase flows with phase change. The authors used a hybrid front tracking method without connectivity, which can easily handle complex topological changes.…”

Section: Coupling Between Level Set and Ghost Fluid Methodsmentioning

confidence: 99%

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Numerical simulation of boiling on unstructured grids

Sahut

Ghigliotti

Balarac

et al. 2021

Journal of Computational Physics

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Section: Numerical Results In 3dmentioning

confidence: 99%

Section: Coupling Between Level Set and Ghost Fluid Methodsmentioning

confidence: 99%

Numerical simulation of boiling on unstructured grids

Sahut

Ghigliotti

Balarac

et al. 2021

Journal of Computational Physics

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“…Various approaches are possible [44] for capturing mass transfer at a fluid interface. For the case of evaporation mass transfer typical of boiling flows, essentially two classes of approaches have been developed, used in conjunction with various interface capturing techniques, as summarised in Table 1.…”

Section: Modelling Mass Transfermentioning

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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“…The LFRM can easily handle complex topological changes like droplet collisions and merging and can accurately capture the interface dynamics while using relatively coarse grids compared to front capturing methods 23 . We have extended the LFRM to include phase transition using a sharp interface approach for the energy equation 24 . The extended method has been verified against analytical solutions for standard 1D and 3D tests and validated against experimental data for 3D bubble rise and growth in a supersaturated liquid.…”

Section: Introductionmentioning

confidence: 99%

A numerical study of flow boiling in a microchannel using the local front reconstruction method

et al. 2022

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The rapid advances in performance and miniaturization of electronic devices require a cooling technology that can remove the produced heat at a high rate with small temperature variations, as is obtained in flow boiling. To obtain insight in flow boiling, we performed numerical simulations in a 200 μm square microchannel using the local front reconstruction method. Besides validation with literature results, a parametric study shows an increasing heat removal rate and bubble growth rate with increasing wall temperature, liquid mass density, and liquid heat capacity and decreasing inlet velocity indicating the importance of phase change compared to convective transport. Finally, the heat transfer in the liquid film is studied using a Nusselt number defined with the film thickness, which is comparable to Nusselt number for falling films on hot surfaces. It is observed that convective effects are more pronounced at the bubble rear compared to the bubble front.

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A critical comparison of smooth and sharp interface methods for phase transition

Cited by 22 publications

References 34 publications

Numerical simulation of boiling on unstructured grids

Numerical simulation of boiling on unstructured grids

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

A numerical study of flow boiling in a microchannel using the local front reconstruction method

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