Bubble formation in a step-emulsification microdevice: hydrodynamic effects in the cavity

Zhiwei Zhang; Zhongdong Wang; Fengrui Bao; Mengyu Fan; Shaokun Jiang; Chunying Zhu; Youguang Ma; Taotao Fu

Journal of Industrial and Engineering Chemistry, Vol.94, 127-133, February, 2021

DOI10.1016/j.jiec.2020.12.013 Export Citation

Bubble formation in a step-emulsification microdevice: hydrodynamic effects in the cavity

Zhiwei Zhang, Zhongdong Wang, Fengrui Bao, Mengyu Fan, Shaokun Jiang¹, Chunying Zhu, Youguang Ma, and Taotao Fu^†

State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
¹The 718th Research Institute of China Shipbuilding Industry Corporation, No. 17 Zhanlan Road, Handan City, Hebei Province 056027, China

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This study focuses on the generation of bubbles in a step-emulsification microdevice via a two-angle photography method. It's found that the bubble generation mechanism is controlled by the interfacial tension, below a critical capillary number; while controlled by viscous force, inertial force and the disturbance induced by the bubble swarm, above the critical capillary number. From the two-angle photography method, a model is established for predicting the bubble size, by taking into account of the dynamic contact angle between gas-liquid interface and wall, and the hydrodynamic feedback of the cavity on bubble formation via the quantification of resistance by the volume fraction of gas in the cavity.

Keywords:Microfluidics;Step emulsification;Interfacial phenomenon;Bubble

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[2] Yao C, Zhao Y, Zheng J, Zhang Q, Chen G, AIChE J., 66(5) (2020)

[3] Hashimoto M, Whitesides GM, Small, 6(9), 1051 (2010)

[4] Nauman K, Isao K, Marcos AN, Crit. Rev. Food Sci. Nutr., 58(14), 2364 (2018)

[5] Whitesides GM, Nature, 442(7101), 368 (2006)

[6] Meng J, Wu G, Wu X, Cheng H, Xu Z, Chen S, Adv Sci, 7(1), 190193 (2020)

[7] Bac S, Avci AK, Chem. Eng. J., 377, 121004 (2019)

[8] Link DR, Anna SL, Weitz DA, Stone HA, Phys. Rev. Lett., 92(5), 054503 (2004)

[9] Hashimoto M, Shevkoplyas SS, Zasonska B, Szymborski T, Garstecki P, Whitesides GM, Small, 4(10), 1795 (2008)

[10] Wang XD, Zhu CY, Wu YN, Fu TT, Ma YG, Chem. Eng. Sci., 132, 128 (2015)

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

[12] Yamawaki B, Mori R, Tsukagoshi K, Tsuchiya K, Yamashita K, Murata M, Anal. Sci., 35(3), 249 (2019)

[13] Lei L, Zhang H, Bergstrom DJ, Anthony T, Song KY, Zhang W, Micromech. Microeng., 30(5) (2020)

[14] Sugiura S, Nakajima M, Tong JH, Nabetani H, Seki M, J. Colloid Interface Sci., 227(1), 95 (2000)

[15] Sugiura S, Nakajima M, Iwamoto S, Seki M, Langmuir, 17(18), 5562 (2001)

[16] Kawakatsu T, Kikuchi Y, Nakajima M, J. Am. Oil Chem. Soc., 74(3), 317 (1997)

[17] Yasuno M, Sugiura S, Iwamoto S, Nakajima M, Shono A, AIChE J., 50(12), 3227 (2004)

[18] Zhang Z, Jiang S, Zhu C, Ma Y, Fu T, Chem. Eng. Sci., 224, 115815 (2020)

[19] Mi S, Fu T, Zhu C, Jiang S, Ma Y, AIChE J., 66(1), e16777 (2020)

[20] Klooster S, Sahin S, Schroen K, Sci Rep, 9, 7820 (2019)

[21] Sugiura S, Nakajima M, Seki M, Langmuir, 18(15), 5708 (2002)

[22] Sugiura S, Nakajima M, Kumazawa N, Iwamoto S, Seki M, J. Phys. Chem. B, 106(36), 9405 (2002)

[23] Wang M, Kong C, Liang Q, Zhao J, Wen M, Xu Z, Ruan X, RSC Adv., 8(58), 33042 (2018)

[24] Eggersdorfer ML, Seybold H, Ofner A, Weitz DA, Studart AR, Proc. Natl. Acad. Sci. U.S.A., 115(38), 9478 (2018)

[25] Stoffel M, Wahl S, Lorenceau E, Hohler R, Mercier B, Angelescu DE, Phys. Rev. Lett., 198302 (2012).

[26] van Dijke KC, Schroen KCPGH, Boom RM, Langmuir, 24(18), 10107 (2008)

[27] Utada AS, Fernandez-Nieves A, Stone HA, Weitz DA, Phys. Rev. Lett., 99(9), 094502 (2007)

[28] Ma YD, Microfluid. Nanofluid., 12(1-4), 671 (2011)

[29] Belloul M, Engl W, Colin A, Panizza P, Ajdari A, Phys. Rev. Lett., 102(19), 194502 (2009)

[30] Raven JP, Marmottant P, Phys. Rev. Lett., 102, 084501 (2009)

[31] Fuerstman MJ, Lai A, Thurlow ME, Shevkoplyas SS, Stone HA, Whitesides GM, Lab Chip, 7, 1479 (2007)