Numerical Study of Bubble Breakup in Fractal Tree-Shaped Microchannels.
作者： Chengbin Zhang , Xuan Zhang , Qianwen Li , Liangyu Wu
DOI: 10.3390/IJMS20215516
关键词:
摘要: Hydrodynamic behaviors of bubble stream flow in fractal tree-shaped microchannels is investigated numerically based on a two-dimensional volume fluid (VOF) method. Bubble breakup examined each level bifurcation and the transition regimes discussed particular. The pressure variations at center different levels bifurcations are analyzed an effort to gain further insight into underlying mechanism affected by multi-levels microchannel. results indicate that due structure microchannel, both lengths bubbles local capillary numbers decrease along microchannel under constant inlet number. Hence from obstructed obstructed-tunnel combined coalescence observed when flowing higher bifurcations. Compared with bifurcations, show stronger periodicity lower Perturbations grow magnify direction field becomes more chaotic Besides, feedback unequal downstream upstream affects enhances asymmetrical behaviors.
mdpi.com
sci-hub.se 参考文章(33)
Tsu-Hsu Yen, Effects of wettability and interfacial nanobubbles on flow through structured nanochannels: an investigation of molecular dynamics Molecular Physics. ,vol. 113, pp. 3783- 3795 ,(2015) , 10.1080/00268976.2015.1062928
Maarten P. Kok, Tim Segers, Michel Versluis, Bubble sorting in pinched microchannels for ultrasound contrast agent enrichment Lab on a Chip. ,vol. 15, pp. 3716- 3722 ,(2015) , 10.1039/C5LC00370A
Shelley Lynn Anna, Droplets and Bubbles in Microfluidic Devices Annual Review of Fluid Mechanics. ,vol. 48, pp. 285- 309 ,(2016) , 10.1146/ANNUREV-FLUID-122414-034425
Vittorio Cristini, Yung-Chieh Tan, Theory and numerical simulation of droplet dynamics in complex flows—a review Lab on a Chip. ,vol. 4, pp. 257- 264 ,(2004) , 10.1039/B403226H
Duong A. Hoang, Cees Haringa, Luis M. Portela, Michiel T. Kreutzer, Chris R. Kleijn, Volkert van Steijn, Design and characterization of bubble-splitting distributor for scaled-out multiphase microreactors Chemical Engineering Journal. ,vol. 236, pp. 545- 554 ,(2014) , 10.1016/J.CEJ.2013.08.066
Taotao Fu, Youguang Ma, Huai Z. Li, Hydrodynamic feedback on bubble breakup at a T‐junction within an asymmetric loop Aiche Journal. ,vol. 60, pp. 1920- 1929 ,(2014) , 10.1002/AIC.14377
Yongping Chen, Zilong Deng, Gas flow in micro tree-shaped hierarchical network International Journal of Heat and Mass Transfer. ,vol. 80, pp. 163- 169 ,(2015) , 10.1016/J.IJHEATMASSTRANSFER.2014.09.016
Changkwon Chung, Misook Lee, Kookheon Char, Kyung Hyun Ahn, Seung Jong Lee, Droplet dynamics passing through obstructions in confined microchannel flow Microfluidics and Nanofluidics. ,vol. 9, pp. 1151- 1163 ,(2010) , 10.1007/S10404-010-0636-X
A. M. Leshansky, L. M. Pismen, Breakup of drops in a microfluidic T junction Physics of Fluids. ,vol. 21, pp. 023303- ,(2009) , 10.1063/1.3078515
Yongping Chen, Xiangdong Liu, Mingheng Shi, Hydrodynamics of double emulsion droplet in shear flow Applied Physics Letters. ,vol. 102, pp. 051609- ,(2013) , 10.1063/1.4789865