A multicomponent multiphase enthalpy-based lattice Boltzmann method for droplet solidification on cold surface with different wettability

Xu, Peng; Xu, Shaonan; Gao, Yuan; Liu, Pengcheng

doi:10.1016/j.ijheatmasstransfer.2018.07.017

Cited by 19 publications

(5 citation statements)

References 14 publications

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“…The above evolution equation scheme with B is widely applied in the liquid-solid phase change simulations with the LB model [21][22][23][24][25][26][27][28]. In these works, the solid density equals the liquid one.…”

Section: Solid-liquid Phase Change With Volume Changementioning

confidence: 99%

“…To our best knowledge, no study has been reported using LBM for simulating the water freezing phenomenon with volume expansion or density change. Our search from the open literature shows that the reported studies are on the use of LBM to simulate water droplet freezing [24][25][26], in which a two-dimensional (2D) droplet is considered with fixed droplet interface and the same ice and water densities. Li et al [27] conducted a three-dimensional (3D) simulation of the continuous phase change from water vapor condensation to freezing on a cryogenic spot; in their work, the droplet is not completely solidified, and the volume change is not taken into account.…”

Section: Introductionmentioning

confidence: 99%

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Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change

Zhang

Fang

et al. 2020

Phys. Rev. E

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Droplet freezing not only is of fundamental interest but also plays an important role in numerous natural and industrial processes. However, it is challenging to numerically simulate the droplet freezing process due to its involving a complex three-phase system with dynamic phase change and heat transfer. Here we propose an axisymmetric lattice Boltzmann (LB) model to simulate the freezing process of a sessile water droplet with consideration of droplet volume expansion. Combined with the multiphase flow LB model and the enthalpy thermal LB model, our proposed approach is applied to simulate the sessile water droplet freezing on both hydrophilic and hydrophobic surfaces at a fixed subcooled temperature. Through comparison with the experimental counterpart, the comparison results show that our axisymmetric LB model can satisfactorily describe such sessile droplet freezing processes. Moreover, we use both LB simulations and analytical models to study the effects of contact angle and volume expansion on the freezing time and the cone shape formed on the top of frozen droplets. The analytical models are obtained based on heat transfer and geometric analyses. Additionally, we show analytically and numerically that the freezing front-to-interface angle keeps nearly constant (smaller than 90°).

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Section: Solid-liquid Phase Change With Volume Changementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change

Zhang

Fang

et al. 2020

Phys. Rev. E

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“…Li et al [11][12][13][14][15][16] improved the pseudopotential force model, wall wettability model and adjustable surface tension model under large density ratio, combined with the MRT-LBM model of multi-relaxation, gas state equation, etc., and simulated and studied the multiphase ow boiling heat transfer and phase transition process. The simulation of droplet impact on stationary walls based on the lattice Boltzmann method has also been thoroughly studied, such as the study of droplets, walls, environment and other aspects [17][18][19][20][21] .…”

Section: Introductionmentioning

confidence: 99%

Study on the motion characteristics of a single droplet impacting stationary wall based on the pseudopotential MRT-LBM model

Wang,

Li,

Wang

2024

Preprint

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The MRT-LBM pseudopotential model with large density ratio with adjustable surface tension was used to simulate the motion process of single droplet hitting the stationary wall, and the influence of Reynolds number, Weber number and Bond number on the motion characteristics of the droplet was analyzed. The accuracy of the model is verified from multiple angles. The results show that the increase of Reynolds number and Weber number is conducive to the increase of droplet spreading diameter, maximum spreading factor and dimensionless height in the droplet spreading stage, the difference is that the increase of Reynolds number and Weber number leads to the increase of droplet spreading time, while the increase of Bond number cannot change the droplet spreading time. During the movement of the droplet, Webb counts too little, and "ring-shaped" droplets appear in the droplet retraction stage, and Webb counts too little, and the droplets cannot be retracted after spreading, but directly fragment into small droplets.

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“…Due to its convenience, the enthalpy method is widely applied in the field of solidification of metals and alloys [17,18] as well as welding and additive manufacturing simulations [19][20][21][22][23][24][25][26][27]. However, in these works, the enthalpy of mixing is not considered.…”

Section: Introductionmentioning

confidence: 99%

A CALPHAD-Informed Enthalpy Method for Multicomponent Alloy Systems with Phase Transitions

Scherr,

Liepold,

Markl

et al. 2024

Modelling

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Solid–liquid phase transitions of metals and alloys play an important role in many technical processes. Therefore, corresponding numerical process simulations need adequate models. The enthalpy method is the current state-of-the-art approach for this task. However, this method has some limitations regarding multicomponent alloys as it does not consider the enthalpy of mixing, for example. In this work, we present a novel CALPHAD-informed version of the enthalpy method that removes these drawbacks. In addition, special attention is given to the handling of polymorphic as well as solid–liquid phase transitions. Efficient and robust algorithms for the conversion between enthalpy and temperature were developed. We demonstrate the capabilities of the presented method using two different implementations: a lattice Boltzmann and a finite difference solver. We proof the correct behaviour of the developed method by different validation scenarios. Finally, the model is applied to electron beam powder bed fusion—a modern additive manufacturing process for metals and alloys that allows for different powder mixtures to be alloyed in situ to produce complex engineering parts. We reveal that the enthalpy of mixing has a significant effect on the temperature and lifetime of the melt pool and thus on the part properties.

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A multicomponent multiphase enthalpy-based lattice Boltzmann method for droplet solidification on cold surface with different wettability

Cited by 19 publications

References 14 publications

Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change

Axisymmetric lattice Boltzmann model for simulating the freezing process of a sessile water droplet with volume change

Study on the motion characteristics of a single droplet impacting stationary wall based on the pseudopotential MRT-LBM model

A CALPHAD-Informed Enthalpy Method for Multicomponent Alloy Systems with Phase Transitions

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