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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.
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Keywords:
- modified hydrophobic solid surface /
- wettability alteration /
- lattice Boltzmann method /
- numerical simulation
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[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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[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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