改性疏水固壁润湿性反转现象的格子Boltzmann方法模拟

刘邱祖; 寇子明; 贾月梅; 吴娟; 韩振南; 张倩倩

doi:10.7498/aps.63.104701

摘要

基于疏水固壁改性会引起润湿性反转的特点，采用考虑固体与液体间分子力的格子Boltzmann方法，从壁面的线性和瞬时改性两方面对润湿性反转现象进行了数值模拟，并结合流体体积方法处理界面层质量. 结果表明：壁面线性改性的过程中润湿性反转变化平稳，润湿所需时间大幅减少，所得到的接触角与固液吸引力系数的关系与其他文献结果一致；壁面瞬时改性幅度越大说明固壁对液滴作用力越强，表现为润湿性变化越明显，瞬时改性后接触角随时间呈指数规律变化，这与现有结论相符合. 研究发现：在改性条件下液膜铺展过程中伴随着振荡变化，线性改性的振动峰值与改性幅度相关；瞬时改性的液膜速度会在某一时刻突然增大，这种现象与夹带空气有关.

关键词:

Abstract

Based on the wettability alteration caused by the modified hydrophobic solid surface, the phenomenon of wettability alteration is simulated numerically in terms of linear and instantaneous modification by using the lattice Boltzmann method which can properly reflect the interaction of solid-liquid molecules, combined with the volume of fluid method to dispose the quality of interface layer. Results show that the wettability changes smoothly in the process of linear modification, the time needed for wetting significantly decreases, and the relationship between the contact angle and attractive coefficient of solid-liquid accord well with literature data. The more greatly the amplitude of instantaneous modification changes, the stronger the force of solid acting on droplet is, which is reflected by the obvious change of wettability. It is also found that the contact angle changes exponentially with time after instantaneous modification, which is in good agreement with the existing conclusions. Further investigation shows that the liquid oscillation exists in the whole spreading process. The vibration peak is associated with the modified amplitude of linear modification. And liquid film velocity increases suddenly at sometime after instantaneous modification, which is associated with entrained air.

Keywords:

作者及机构信息

1.
太原理工大学机械工程学院, 太原 030024;

2.
山西省矿山流体控制工程实验室, 太原 030024;

3.
太原理工大学力学学院, 太原 030024

基金项目: 国家自然科学基金联合基金（批准号：U1261107）资助的课题.

Authors and contacts

1.
College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China;

2.
Mine Fluid Control Engineering Laboratory of Shanxi Province, Taiyuan 030024, China;

3.
College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, China

Funds: Project supported by the Joint Funds of the National Natural Science Foundation of China (Grant No. U1261107).

参考文献

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[30]	Lee K S, Ivanova N, Starov V M, Hilal N, Dutschk V 2008 Adv. Colloid Interf. Sci. 144 54
[31]	Li H, Zheng M J, Liu S D, Ma L, Zhu C Q, Xiong Z Z 2013 Surf. Coat. Technol. 224 88
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施引文献

[1]	Sun Z H, Han R J 2008 Chin. Phys. B 17 3185
[2]	Shen Z Y, He Y 2012 Chin. Phys. Lett. 29 024703
[3]	Mahmood R S, Sonia B, Luc G F 2012 Appl. Surf. Sci. 258 6416
[4]	Tsekova R, Borissovb D, Karakasheva S I 2013 Colloids Surf. A 423 77
[5]	Lee K S, Starov V M 2009 J. Colloid Interf. Sci. 329 3615
[6]	Winkels K G, Weijs J H, Eddi A, Snoeijer J H 2012 Phys. Rev. E 85 055301
[7]	Beacham D R, Matar O K 2009 Langmuir 25 14174
[8]	Liu S S, Zhang C H, Zhang H B, Zhou J, He J G, Yin H Y 2013 Chin. Phys. B 22 106801
[9]	Zhu X T, Zhang Z Z, Men X H, Yang J, Xu X H, Zhu X T, Xue Q J 2011 Appl. Surf. Sci. 257 3753
[10]	Bi F F, Guo Y L, Shen S Q, Chen J X 2012 Acta Phys. Sin. 61 184702 (in Chinese) [毕菲菲, 郭亚丽, 沈胜强, 陈觉先 2012 物理学报 61 184702]
[11]	Yang J, Zhang Z Z, Men X H, Xu X H, Zhu X T 2011 Carbon 49 19
[12]	Gao Y F, Sun D Y 2010 Chin. Phys. Lett. 27 066802
[13]	Gong M G, Liu Y Y, Xu X L 2010 Chin. Phys. B 19 106801
[14]	Su T X, Ma L Q, Liu M B, Chang J Z 2013 Acta Phys. Sin. 62 064702 (in Chinese) [苏铁熊, 马理强, 刘谋斌, 常建忠 2013 物理学报 62 064702]
[15]	Wang J F, Sun F X, Cheng R J 2010 Chin. Phys. B 19 060201
[16]	McNamara G R, Zanetti G 1988 Phys. Rev. Lett. 61 2332
[17]	Dupuis A, Yeomans J M 2005 Langmuir 21 2624
[18]	Wang W X, Shi J, Qiu B, Li H B 2010 Acta Phys. Sin. 59 8371 (in Chinese) [王文霞, 施娟, 邱冰, 李华兵 2010 物理学报 59 8371]
[19]	Sun D K, Jiang D, Xiang N, Chen K, Ni Z H 2013 Chin. Phys. Lett. 30 074702
[20]	Kawasaki A, Onishi J, Chen Y, Ohashi H 2007 Comp. Math. Appl. 55 1492
[21]	Xing X Q, Butler D L, Yang C 2006 Comp. Math. Sci. 7 1
[22]	Kang Q, Zhang D, Chen S 2002 Phys. Fluids 14 3203
[23]	Shi Z Y, Hu G H, Zhou Z W 2010 Acta Phys. Sin. 59 2595 (in Chinese) [石自媛, 胡国辉, 周哲玮 2010 物理学报 59 2595]
[24]	Zhang J F, Li B M, Kwok D Y 2004 Phys. Rev. E 69 032602
[25]	Ginzburg I, Steiner K 2003 J. Comput. Phys. 185 61
[26]	Zhang M L, Hao Z N, Zhang Y P 2013 Acta Oceanol. Sin. 32 38
[27]	Ding Q L, Wang D G, Wang L L 2010 Shuili Xuebao 8 991 (in Chinese) [丁全林, 汪德爟, 王玲玲 2010 水利学报 8 991]
[28]	Liu Q Z, Kou Z M, Han Z N, Gao G J 2013 Acta Phys. Sin. 62 234701 (in Chinese) [刘邱祖, 寇子明, 韩振南, 高贵军 2013 物理学报 62 234701]
[29]	Xiong J B, Seiichi K, Mikio S 2011 J. Nucl. Sci. Technol. 48 145
[30]	Lee K S, Ivanova N, Starov V M, Hilal N, Dutschk V 2008 Adv. Colloid Interf. Sci. 144 54
[31]	Li H, Zheng M J, Liu S D, Ma L, Zhu C Q, Xiong Z Z 2013 Surf. Coat. Technol. 224 88
[32]	Liu S S, Zhang C H, He J G, Zhou J, Yin H Y 2013 Acta Phys. Sin. 62 206201 (in Chinese) [刘思思, 张朝辉, 何建国, 周杰, 尹恒洋 2013 物理学报 62 206201]
[33]	Siddhartha F L, Vivek V B, Nigam K D P 2007 Chem. Eng. Sci. 62 7214
[34]	Hu G H, Xu A J, Xu Z, Zhou Z W 2008 Phys. Fluids 20 102101

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