冯俊杰^1,2,孙冰¹,姜杰¹,蔡子琦²,高正明²

• 1:中国石油化工股份有限公司青岛安全工程研究院 化学品安全控制国家重点实验室，山东 青岛 266100
• 2:北京化工大学 化学工程学院，北京 100029

摘要(Abstract)：

气泡的破裂行为能够直接改变相界面积与流场分布，进而对于多相反应器中的传递与反应过程产生重要影响。由于在湍流与气泡破裂机理以及数值模拟方法上仍存在诸多不足，目前针对湍流环境中自由运动的气泡破裂过程研究仍非常欠缺。作者分别在二维与三维数值模拟条件下，利用VOF模型研究了单气泡在典型射流场中的运动、形变与破裂过程，并通过高速摄像与PIV方法同步开展了实验研究。该研究对气泡破裂过程特别是破裂前后的形态、周围流场以及与气泡间的相互作用进行了分析。结果表明，该流场条件下液相的剪切作用是气泡破裂的主要影响因素；由于二维模拟可以使用精度更高的网格，对于气泡形变与破裂过程中的界面变化模拟相对精确，而三维模拟对于流场整体结构的模拟更接近PIV实验结果，而在气泡的扭曲变形还原方面误差相对较大。该研究对于实际破裂过程具有较好的参考价值，有助于加深多相流体力学认识，为相关多相反应器的设计与优化提供理论支撑。

关键词(KeyWords)： 气泡;破裂;粒子成像测速(PIV);计算流体力学(CFD);射流场

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（21506005&21376016）；国家重点研发计划（2016YFB0301701）。

作者(Author): 冯俊杰^1,2,孙冰¹,姜杰¹,蔡子琦²,高正明²

DOI: 10.3969/j.issn.1003-9015.2018.02.006

参考文献(References)：

• [1] Kolmogorov A. On the breakage of drops in a turbulent flow[J]. Doklady Akademii Nauk SSSR. 1949, 66(5):825-828.
  [2] Liao Y X, Lucas D. A literature review of theoretical models for drop and bubble breakup in turbulent dispersions[J]. Chemical Engineering Science, 2009, 64(15):3389-3406.
  [3] Nguyen V T, Song C H, Bae B U, et al. Modeling of bubble coalescence and break-up considering turbulent suppression phenomena in bubbly two-phase flow[J]. International Journal of Multiphase Flow, 2013, 54:31-42
  [4] WEN Yu (温宇), ZHU Chun-ying (朱春英), FU Tao-tao (付涛涛), et al. Volume distribution and correlation of bubbles in a microfluidic T-junction with unequal width bifurcations (不等宽T型分岔微通道内气泡的体积分配规律及关联)[J]. Journal of Chemical Engineering of Chinese Universities (高校化学工程学报), 2016, 30(1):19-25.
  [5] YU Shui-bo (于水波), ZHAO Zong-chang (赵宗昌), YIN Cao-yong (尹曹勇). The simulation of the drop sizes in turbulent liquid-liquid dispersions (湍流分散系统中液滴尺寸的模拟与研究)[J]. Journal of Chemical Engineering of Chinese Universities (高校化学工程学报), 2008, 22(4):574-579.
  [6] Shinnar R. On the behaviour of liquid dispersions in mixing vessels[J]. Journal of Fluid Mechanics, 1961, 10(2):259-275.
  [7] Grace H P. Dispersion phenomena in high viscosity immiscible fluid systems and application of static mixers as dispersion devices in such systems[J]. Chemical Engineering Communications, 1982, 14(3-6):225-277.
  [8] Garstecki P. Fuerstman M J, Stone H A, et al. Formation of droplets and bubbles in a microfluidic T-junction-scaling and mechanism of break-up[J]. Lab On a Chip, 2006, 6(3):437-446.
  [9] Kocamustafaogullari G, Ishii M. Foundation of the interfacial area transport equation and its closure relations[J]. International Journal of Heat and Mass Transfer, 1995, 38(3):481-493.
  [10] MarI nez-Baza n C, Montanes J L, Lasheras J C. On the breakup of an air bubble injected into a fully developed turbulent flow. Part 2. Size PDF of the resulting daughter bubbles[J]. Journal of Fluid Mechanics, 1999, 401:183-207.
  [11] Tsouris C, Tavlarides L L. Breakage and coalescence models for drops in turbulent dispersions[J]. AIChE Journal, 1994, 40(3):395-406.
  [12] Khismatullin D B, Renardy Y K, Cristini V. Inertia-induced breakup of highly viscous drops subjected to simple shear[J]. Physics of Fluids, 2003, 15(5):1351-1354.
  [13] Li J, Renardy Y Y, Renardy M. Numerical simulation of breakup of a viscous drop in simple shear flow through a volume-of-fluid method[J]. Physics of Fluids, 2000, 15(2):269-282.
  [14] ZHOU Yun-long (周云龙), CHANG He (常赫). Lattice Boltzmann simulation of gas-liquid flow in serpentine microchannel with different inlet angles and wall properties (入口角度及壁面性质对蛇形微通道内弹状流流动特性影响的格子Boltzmann模拟)[J]. Journal of Chemical Engineering of Chinese Universities (高校化学工程学报), 2017, 31(2):323-328.
  [15] van sint Annaland M, Deen N G, Kuipers J A M. Numerical simulation of gas bubbles behaviour using a three-dimensional volume of fluid method[J]. Chemical Engineering Science, 2005, 60(11):2999-3011.
  [16] Brackbill J, Kothe D, Zemach C. A continuum method for modeling surface tension[J]. Journal of Computational Physics, 1992, 100(2):335-354.
  [17] Geng X, Song H X, Huang X B, et al. A Study of turbulence properties of continuous phase in gas-liquid flow in a stirred tank[J]. Journal of Chemical Engineering of Japan, 2012, 45(5):315-323.
  [18] Sheng J, Meng H, Fox R O. A large eddy PIV method for turbulence dissipation rate estimation[J]. Chemical Engineering Science, 2000, 55(20):4423-4434.