Collision characteristics of droplet pairs with the presence of arriving distance differences

Xiang Wang; Zhaomiao Liu; Yan Pang

Journal of Industrial and Engineering Chemistry, Vol.69, 225-232, January, 2019

DOI10.1016/j.jiec.2018.09.017 Export Citation

Collision characteristics of droplet pairs with the presence of arriving distance differences

Xiang Wang, Zhaomiao Liu^†, and Yan Pang

College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China

E-mail:

Four collision behaviors are observed for droplet pairs at a T-junction and phase diagrams are constructed by considering the arriving distance difference, the droplet length and the capillary number. Critical conditions for both coalescence and splitting are shown. The main coalescence regime is varied for asynchronous droplet pairs and the cause of the coalescence which occurs while two droplets are pulled apart is confirmed. Movements of the front caps of various droplet pairs are exhibited to show their different degrees of competitions to penetrate into the downstream channel and the advantage that favors coalescence is acquired by comparison.

Keywords:Collision;Droplet pair;Coalescence;T-junction;Synchronization

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[2] Hou L, Ren Y, Jia Y, Deng X, Liu W, Feng X, Jiang H, ACS Appl. Mater. Interfaces, 9, 12282 (2017)

[3] Wen H, Yu Y, Zhu G, Jiang L, Qin J, Lab Chip, 15, 1905 (2015)

[4] Wang X, Liu Z, Pang Y, RSC Adv., 7, 29966 (2017)

[5] Mazutis L, Gilbert J, Ung WL, Weitz DA, Griffiths AD, Heyman JA, Nat. Protoc., 8, 870 (2013)

[6] Kim JH, Jeon TY, Choi TM, Shim TS, Kim SH, Yang SM, Langmuir, 30(6), 1473 (2014)

[7] Hou LK, Jiang HY, Lee D, Chem. Eng. J., 288, 539 (2016)

[8] Pang Y, Kim H, Liu Z, Stone HA, Lab Chip, 14, 4029 (2014)

[9] Rosenfeld L, Lin T, Derda R, Tang SKY, Microfluid. Nanofluid., 16, 921 (2014)

[10] Joensson HN, Svahn HA, Angew. Chem.-Int. Edit., 51, 12176 (2012)

[11] Ma R, Zhang Q, Fu T, Zhu C, Wang K, Ma Y, Luo G, J. Ind. Eng. Chem., 65, 272 (2018)

[12] Bremond N, Bibette J, Soft Matter, 8, 10549 (2012)

[13] Gu H, Murade CU, Duits MH, Mugele F, Biomicrofluidics, 5, 11101 (2011)

[14] Thiam AR, Bremond N, Bibette J, Phys. Rev. Lett., 102, 188304 (2009)

[15] Sesen M, Alan T, Neild A, Lab Chip, 14, 3325 (2014)

[16] Baroud CN, de Saint Vincent MR, Delville JP, Lab Chip, 7, 1029 (2007)

[17] Yoon DH, Jamshaid A, Ito J, Nakahara A, Tanaka D, Akitsu T, Sekiguchi T, Shoji S, Lab Chip, 14, 3050 (2014)

[18] Hu YT, Pine DJ, Leal LG, Phys. Fluids, 12, 484 (2000)

[19] Christopher GF, Bergstein J, End NB, Poon M, Nguyen C, Anna SL, Lab Chip, 9, 1102 (2009)

[20] Zhou Q, Sun Y, Yi S, Wang K, Luo G, Soft Matter, 12, 1674 (2016)

[21] Wang K, Lu YC, Tostado CP, Yang L, Luo GS, Chem. Eng. J., 227, 90 (2013)

[22] Liu Z, Cao R, Pang Y, Shen F, Exp. Fluids, 56 (2015).

[23] Liu Z, Wang X, Cao R, Pang Y, Soft Matter, 12, 5797 (2016)

[24] Niu X, Gulati S, Edel JB, deMello AJ, Lab Chip, 8, 1837 (2008)

[25] Chen X, Brukson A, Ren CL, Microfluid. Nanofluid., 21 (2017)

[26] Jin BJ, Yoo JY, Exp. Fluids, 52, 235 (2011)

[27] Jose BM, Cubaud T, Microfluid. Nanofluid., 12, 687 (2011)

[28] Bremond N, Domejean H, Bibette J, Phys. Rev. Lett., 106, 214502 (2011)

[29] Mazutis L, Griffiths AD, Lab Chip, 12, 1800 (2012)

[30] Jin BJ, Kim YW, Lee Y, Yoo JY, J. Micromech. Microeng., 20, 035003 (2010)

[31] Ahn B, Lee K, Lee H, Panchapakesan R, Oh KW, Lab Chip, 11, 3956 (2011)

[32] Maddala J, Wang WS, Vanapalli SA, Re R, Microfluid. Nanofluid., 14, 337 (2012)

[33] Wang X, Liu ZM, Pang Y, Chem. Eng. Sci., 188, 11 (2018)

[34] Salkin L, Schmit A, Courbin L, Panizza P, Lab Chip, 13, 3022 (2013)

[35] Abate AR, Weitz DA, Lab Chip, 11, 1911 (2011)

[36] Korczyk PM, Cybulski O, Makulska S, Garstecki P, Lab Chip, 11, 173 (2011)

[37] Garstecki P, Fuerstman MJ, Stone HA, Whitesides GM, Lab Chip, 6, 437 (2006)

[38] van Steijn V, Kleijn CR, Kreutzer MT, Lab Chip, 10, 2513 (2010)

[39] Liao YX, Lucas D, Chem. Eng. Sci., 65(10), 2851 (2010)

[40] Gunes DZ, Clain X, Breton O, Mayor G, Burbidge AS, J. Colloid Interface Sci., 343(1), 79 (2010)

[41] Borrell M, Yoon Y, Leal LG, Phys. Fluids, 16, 3945 (2004)

[42] Bremond N, Thiam AR, Bibette J, Phys. Rev. Lett., 100, 024501 (2008)

[43] Lai ANN, Bremond N, Stone HA, J. Fluid Mech., 632, 97 (2009)

[44] Gunes DZ, Bercy M, Watzke B, Breton O, Burbidge AS, Soft Matter, 9, 7526 (2013)

[45] Leal LG, Phys. Fluids, 16, 1833 (2004)