Simulation on mass transfer at immiscible liquid interface entrained by single bubble using particle method

Dong, Chunhui; Guo, Kailun; Cai, Qinghang; Chen, Ronghua; Tian, Wenxi; Qiu, Suizheng; Su, G.H.

doi:10.1016/j.net.2019.11.023

Cited by 11 publications

(5 citation statements)

References 33 publications

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“…图 2 MPI 跨节点并行技术 [4] Figure 2 MPI cross node parallel technology [4]. [6,7] ；将无网格线混合格式与移动半隐式粒子法结合，同时开发非均匀粒子布置与粒子重新排列技术，实现了沸腾过程中汽泡生长、冷凝、溃灭等相变传热过程的模拟 [8~11] ；进一步搭建了复杂运动条件下汽泡动力学特性实验装置，通过可视化实验验证了两相流粒子法程序的模拟准确性 [5] 。基于上述模型，开发了核反应堆冷却剂汽泡动力学数值模拟软件 PANDA-BD，如图 3(a)所示，软件能够实现对竖直壁面上汽泡从成核生长到滑移脱离全过程模拟，揭示了汽泡脱离壁面时的尺寸、时间及速度与流体流速、壁面接触角、液体过冷度、壁面过热度等变量的关系，对理解流动沸腾具有重要意义 [10] ；PANDA-BD 软件能够实现汽泡在过冷流体中冷凝缩小直至溃灭的全过程模拟，图 3(b)所示为汽泡在冷凝溃灭各个阶段的形态特征 [11] ；如图 3(c)所示，软件能够实现较大的液体和气体密度比条件下的汽泡上升过程模拟，模拟结果和 TP2D 的模拟结果具有较好的一致性，多相黏度模型在描述汽泡上升速度方面表现出较好的潜力 [6] ；如图 3(d)所示，软件能够实现两个独立汽泡融合的全过程模拟，预测结果与实验观察结果符合较好 [9] ；如图 3(e)所示，软件能够实现弹状气泡上升行为模拟，获得了汽泡的头部和尾部形态变化规律；如图 3(f)所示，软件能够实现气泡在水油两相流中的上升分离全过程模拟，模拟结果揭示了气泡尺寸、液体密度比、相界面张力对传质特性的影响规律 [7] ；如图 3(g)所示，软件能够实现封闭气液空间中的气泡流动行为模拟，模拟获得了气泡脱离流体时气液界面波动情况和气泡的撕裂过程。粒子法模拟得到的气泡直径 [10] 与气泡上升速度 [12] 等宏观数据与实验结果符合较好，与网格法具有同等精度，在相界面的处理上 PANDA-BD 则更精细。…”

Section: 扰动和处理复杂界面运动的能力，显著提高数值稳定性。建立了粒子法大规模高效并行计算方法，开发了unclassified

“…图 3 PANDA-BD 在两相流中的应用模拟. (a) 竖直壁面汽泡成核生长及滑移脱离过程模拟 [10] ; (b) 汽泡冷凝溃灭过程模拟 [11] ；(c) 大密度比汽泡上升过程模拟 [6] ; (d) 汽泡融合过程模拟 [13] ; (e) 弹状汽泡上升过程模拟 [12] ; (f) 气泡在水油两相流中的上升分离过程模拟 [7] ; (g) 封闭气液空间中的气泡流动行为模拟…”

Section: 扰动和处理复杂界面运动的能力，显著提高数值稳定性。建立了粒子法大规模高效并行计算方法，开发了unclassified

See 1 more Smart Citation

Simulation of the key phenomena in nuclear reactor two-phase flow and severe accident with particle method

CHEN,

TIAN,

GUO

et al. 2024

Sci. Sin.-Tech.

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Section: 扰动和处理复杂界面运动的能力，显著提高数值稳定性。建立了粒子法大规模高效并行计算方法，开发了unclassified

Simulation of the key phenomena in nuclear reactor two-phase flow and severe accident with particle method

CHEN,

TIAN,

GUO

et al. 2024

Sci. Sin.-Tech.

View full text Add to dashboard Cite

“…Numerical simulation methods of bubble motion have been extensively studied by many researchers, such as volume-of-fluid (VOF) method [2][3], level set method [4], lattice Boltzmann method [5], smooth particle hydrodynamics (SPH) method [6], an improved numerical algorithm for front tracking method [7] and moving particle semi-implicit (MPS) method [8], etc. The rising trajectory of a single bubble is related to the fluid properties.…”

Section: Introductionmentioning

confidence: 99%

“…Travis et al [24] studied the effect of initial bubble diameter on bubble growth rate in immiscible liquids. Dong et al [8] analyzed the mass transfer effect of a single bubble at the interface of two immiscible liquids by MPS method, and found that when the viscosity ratio of the two liquids was 2.5, the lower liquid carried by the bubble to the upper liquid.…”

Section: Introductionmentioning

confidence: 99%

The movement and shape change characteristics of a bubble passing through a liquid-liquid interface

Zhang

Qing

et al. 2023

Therm sci

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In order to study the movement and shape change characteristic of bubble when passing through the interface of two kinds of liquids with different viscosity, the free rising process of a single bubble in static stratified liquids was numerically simulated with the volume of fluid (VOF) method. The results show that, when the initial height of bubble rising is the same, the rising velocity, deformation increase with the increase of bubble radius. When the maximum intensity of the vortex in the bubble is distributed at the top of the bubble, the top of the left and right sides and the bottom of the left and right sides, the bubble shape is spherical, ellipsoid and spherical cap shape respectively. At different initial heights, the bubble trajectory shows three different shapes -linear, spiral and C-shaped. The relationship between the bubble aspect ratio and rising height is predicted when different radius bubble passing through the interface. The amount of liquid B(lower layer) carried by the bubble increases with the increase of the bubble?s initial radius, and the amount of liquid carried by bubbles in C-shaped trajectory is higher than that in spiral trajectory.

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“…However, because of insufficient accuracy of liquid-liquid interfacial tension calculation, this model cannot demonstrate the thin film rupturing surrounding the bubble. Dong et al [28] used another particle method called moving particle semiimplicit (MPS) to simulate this phenomenon. They reported all previous findings and proved the validity of their model.…”

Section: Introductionmentioning

confidence: 99%

Passage of a rising bubble through a liquid‐liquid interface: A flow map for different regimes

2021

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The passage of a rising air bubble through a stratified horizontal interface between two Newtonian liquids is studied numerically. A ternary phase-field model has been utilized for capturing the interface between three immiscible fluids. According to the previous studies, the density, viscosity, and surface tension of the two liquids, in addition to the bubble diameter, are the effective parameters of bubble interaction with the interface. By changing these variables, three main flow patterns are identified in numerical simulations. Penetration flow regime is observed when the bubble enters the upper liquid alone and does not raise the lower liquid. Entrainment flow regime occurs when the bubble lifts some of the heavier liquid to the lighter liquid but still rises alone. If the bubble holds a film of the denser liquid when it rises in the upper liquid, envelopment flow regime takes place. A flow regime map is represented to distinguish the aforementioned flow patterns using Weber and Morton numbers and determine regime transition criteria based on these two dimensionless parameters. For Weber numbers lower than 30, or Morton numbers higher than 1.7 × 10 −2 , the penetration regime is observed. On the contrary, when the Weber number is higher than 65 and the Morton number is lower than 7 × 10 −5 , the envelopment regime occurs. The entrainment pattern happens between these ranges and two additional limiting relations of 320Mo 0.18 < We < 1500Mo 0.23 .

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Simulation on mass transfer at immiscible liquid interface entrained by single bubble using particle method

Cited by 11 publications

References 33 publications

Simulation of the key phenomena in nuclear reactor two-phase flow and severe accident with particle method

Simulation of the key phenomena in nuclear reactor two-phase flow and severe accident with particle method

The movement and shape change characteristics of a bubble passing through a liquid-liquid interface

Passage of a rising bubble through a liquid‐liquid interface: A flow map for different regimes

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