冯俊杰,孙冰,姜杰,蔡子琦,高正明

• 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
• 2:北京化工大学化学工程学院

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,孙冰,姜杰,蔡子琦,高正明

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]Mar I 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].AICh E 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.