黏性溶液中单个气泡的运动形变Shape Evolution of a Single Rising Bubble in Viscous Solutions
黄程蓉,陈小鹏,周丹,韦小杰,梁杰珍,王琳琳
摘要(Abstract):
自主设计了一套具有恒压、恒温控制的稳定鼓泡发生装置。采用高速摄影技术对静止松脂溶液中单个CO2气泡运动形态进行分析,考察了气泡尺度对松脂溶液中单个气泡形变特点和规律的影响。结果表明,气泡直径d <1 mm时,气泡都能保持为球形;当d> 1 mm时,气泡逐渐由类似椭球形向不规则球帽性转变。黏度较小的溶液中,较大气泡表面伴随有振荡,气泡纵横比随上升高度表现出一定程度的振荡;随着溶液黏度的增加,气泡纵横比稳定,气泡形状为规则的椭球形。提出了气泡纵横比的预测模型,其预测结果与实验值吻合良好。
关键词(KeyWords): 松脂;单气泡;气泡形状;纵横比
基金项目(Foundation): 国家自然科学基金(31560241,51563001,21878056);; 广西石化资源加工及过程强化技术重点实验室主任课题基金(2016Z002)
作者(Author): 黄程蓉,陈小鹏,周丹,韦小杰,梁杰珍,王琳琳
参考文献(References):
- [1]Rodrigues-Corrêa K C D S,Lima J C D,Fett-Neto A G.Pine oleoresin:tapping green chemicals,biofuels,food protection,and carbon sequestration from multipurpose trees[J],Food&Energy Security,2012,1(2):81-93.
- [2]Zhang D,Zhou D,Wei X J,et al.Green catalytic conversion of hydrogenated rosin to glycerol esters using subcritical CO2 in water and the associated kinetics[J].Journal of Supercritical Fluid,2017,125:12-21.
- [3]Huang Y Y,Chen X P,Deng Y F,et al.A novel nickel catalyst derived from layered double hydroxides(LDHs)supported on fluid catalytic cracking catalyst residue(FC3R)for rosin hydrogenation[J].Chemical Engineering Journal,2015,269:434-443.
- [4]Huang Y,Zhao S,Ding Y D,et al.Optimizing the gas distributor based on CO2 bubble dynamic behaviors to improve microalgal biomass production in an air-lift photo-bioreactor[J].Bioresource Technology,2017,233:84-91.
- [5]Yang Z B,Cheng J,Lin R C,et al.Improving microalgal growth with reduced diameters of aeration bubbles and enhanced mass transfer of solution in an oscillating flow field[J].Bioresource Technology,2016,211:429-434.
- [6]Rubio J,Smith R.Overview of flotation as a wastewater treatment technique[J].Mineral Engineering,2002,15(3):139-155.
- [7]Parihar R,Upadhyay K.Production of bio-hydrogen gas from wastewater by anaerobic fermentation process:a review[J].International Journal of Chemical Studies,2015,3(3):07-14.
- [8]Kulkarni A,Joshi J.Bubble formation and bubble rise velocity in gas-liquid systems:a review[J].Industrial&Engineering Chemistry Research,2005,44(16):5873-5931.
- [9]HAO Zhi-gang(郝志刚),BAO Yu-yun(包雨云),GAO Zheng-ming(高正明).Gas-liquid dispersion in a multi-impeller stirred tank(多层组合桨搅拌槽内气-液分散特性的研究)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2004,18(5):547-552.
- [10]Okawa T,Tanaka T,Kataoka I,et al.Temperature effect on single bubble rise characteristics in stagnant distilled water[J].International of Heat and Mass Transfer,2003,46(5):903-913.
- [11]Clift R,Grace J R.Weber M E.Bubbles,drops,and particles[M].New York:Courier Dover Publications,2005.
- [12]Bhaga D,Weber M E.Bubbles in viscous liquids:shapes,wakes and velocities[J].Journal of Fluid Mechanics,1981,105(1):61-85.
- [13]Grace J R.Shapes and velocities of bubbles rising in infinite liquids[J].Transactions of the Institution of Chemical Engineers,1973,51(1):116-120.
- [14]Wellek R M,Agrawal A K,Skelland A H P.Shape of liquid drops moving in liquid media[J].AIChE Journal,1996,12(5):854-862.
- [15]Moore D W.The rise of a gas bubble in a viscous liquid[J].Journal of Fluid Mechanics,1959,6(1):113-130.
- [16]Taylor T D,Acrivos A.On the deformation and drag of a falling viscous drop at low Reynolds number[J].Journal of Fluid Mechanics,1964,18(3):466-476.
- [17]Kelbaliyev G,Ceylan K.Development of new empirical equations for estimation of drag coefficient,shape deformation,and rising velocity of gas bubbles or liquid drops[J].Chemical Engineering Communications,2007,194(12):1623-1637.
- [18]Raymond F,Rosant J M.A numerical and experimental study of the terminal velocity and shape of bubbles in viscous liquids[J].Chemical Engineering Science,2000,55(5):943-955.
- [19]Tadaki T,Maeda S.On the shape and velocity of single air bubbles rising in various liquids[J].Kagaku Kogaku,1961,25(4):254-264.
- [20]Vakhrushev I A,Efremov G I,A study of the hydrodynamics of a three-phase fluidized bed[J].Chemistry and Technology of Fuels and Oils,1969,5(8):541-545.