Abstract
This paper is mainly to study the mixing efficiency and pressure drop of the Minkowski fractal obstacle micromixers. The mixing efficiency of primary Minkowski fractal obstacle (PMFO) micromixer and secondary Minkowski fractal obstacle (SMFO) micromixer are compared at five kinds of Reynolds numbers. With the increase of obstacle height and the decrease of distance, the chaotic convection in the microchannel is enhanced. Especially at obstacle height (h) = 0.2 mm, obstacle distance (D) = 0.15 mm, and Re = 100, the vortex caused by the Minkowski fractal obstacle structure is more obvious. In addition, vortex phenomenon increases the contact area of two fluids and enhances chaotic convection. It shows that the flow direction of the fluid in the microchannel varies significantly.
Acknowledgements
This work was supported by Liaoning Natural Science Foundation (2019-MS-169), The Key Project of Department of Education of Liaoning Province (JZL201715401), Liaoning BaiQianWan Talents Program. We sincerely thank Prof. Chong Liu for his kind guidance.
References
Alam, A., and K. Y. Kim. 2013. “Mixing Performance of a Planar Micromixer with Circular Chambers and Crossing Constriction Channels.” Sensors & Actuators B Chemical 176 (1): 639–52.10.1016/j.snb.2012.09.047Search in Google Scholar
Ali, S., C. Habchi, et al. 2015. “Heat Transfer and Mixing Enhancement by Free Elastic Flaps Oscillation.” International Journal of Heat and Mass Transfer 85: 250–64.10.1016/j.ijheatmasstransfer.2015.01.122Search in Google Scholar
Araci, I. E., and P. Brisk. 2014. “Recent Developments in Microfluidic Large Scale Integration.” Current Opinion in Biotechnology 25: 60–68.10.1016/j.copbio.2013.08.014Search in Google Scholar PubMed
Catarino, S. O., L. R. Silva, et al. 2014. “Piezoelectric Actuators for Acoustic Mixing in Microfluidic Devices—Numerical Prediction and Experimental Validation of Heat and Mass Transport.” Sensors and Actuators B: Chemical 205: 206–14.10.1016/j.snb.2014.08.030Search in Google Scholar
Chen, X., and T. Li. 2017. “A Novel Passive Micromixer Designed by Applying an Optimization Algorithm to the Zigzag Microchannel.” Chemical Engineering Journal 313: 1406–14.10.1016/j.cej.2016.11.052Search in Google Scholar
Chen, X., T. Li, et al. 2016. “Numerical and Experimental Investigation on Micromixers with Serpentine Microchannels.” International Journal of Heat and Mass Transfer 98: 131–40.10.1016/j.ijheatmasstransfer.2016.03.041Search in Google Scholar
Chen, X., J. Shen, and M. Zhou. 2016. “Rapid Fabrication of a Four-layer PMMA-based Microfluidic Chip Using CO2-laser Micromachining and Thermal Bonding.” Journal of Micromechanics and Microengineering 26 (10): 107001.10.1088/0960-1317/26/10/107001Search in Google Scholar
Cheri, M. S., H. Latifi, et al. 2013. “Simulation and Experimental Investigation of Planar Micromixers with Short-Mixing-Length.” Chemical Engineering Journal 234: 247–55.10.1016/j.cej.2013.08.067Search in Google Scholar
Gambhire, S., N. Patel, G. Gambhire, and S. Kale. 2016. “A Review on Different Micromixers and Its Micromixing within Microchannel.” Advances in Mechanical Engineering Techniques.Search in Google Scholar
Garofalo, F., A. Adrover, S. Cerbelli, and M. Giona. 2010. “Spectral Characterization of Static Mixers. The S-shaped Micromixer as a Case Study.” Aiche Journal 56 (2): 318–35.10.1002/aic.11994Search in Google Scholar
Hai, L. T., Q. T. Bao, H. Le-Thanh, F. Karlsen, and T. Nguyen-Thoi A Novel Design of Passive Split and Recombination Micromixer with Trapezoidal Zigzag Channels IEEE, International Conference on Nano/micro Engineered and Molecular Systems. IEEE, 2015:28–31.Search in Google Scholar
Han, W., and X. Chen. 2019. “New Insights into the Pressure During the Merged Droplet Formation in the Squeezing Time.” Chemical Engineering Research and Design 145: 213–25.10.1016/j.cherd.2019.03.002Search in Google Scholar
Kamholz, A. E., and P. Yager. 2002. “Molecular Diffusive Scaling Laws in Pressure-driven Microfluidic Channels: Deviation from One-dimensional Einstein Approximations.” Sensors and Actuators B: Chemical 82 (1): 117–21.10.1016/S0925-4005(01)00990-XSearch in Google Scholar
Lee, C. Y., W. T. Wang, et al. 2016. “Passive Mixers in Microfluidic Systems: A Review.” Chemical Engineering Journal 288: 146–60.10.1016/j.cej.2015.10.122Search in Google Scholar
Lim, C. Y., Y. C. Lam, and C. Yang. 2010. “Mixing Enhancement in Microfluidic Channel with a Constriction under Periodic Electro-Osmotic Flow.” Biomicrofluidics 4 (1): 014101.10.1063/1.3279790Search in Google Scholar PubMed PubMed Central
Mondal, B., S. K. Mehta, et al. 2019. “Numerical Study of Mixing in Wavy Micromixers: Comparison between Raccoon and Serpentine Mixer.” Chemical Engineering and Processing-Process Intensification 136: 44–61.10.1016/j.cep.2018.12.011Search in Google Scholar
Ortega-Casanova, J. 2017. “Application of CFD on the Optimization by Response Surface Methodology of a Micromixing Unit and Its Use as a Chemical Microreactor.” Chemical Engineering and Processing: Process Intensification 117: 18–26.10.1016/j.cep.2017.03.012Search in Google Scholar
Pan, Z., R. Zhang, et al. 2018. “Direct Measurement of Microscale Flow Structures Induced by Inertial Focusing of Single Particle and Particle Trains in a Confined Microchannel.” Physics of Fluids 30 (10): 102005.10.1063/1.5048478Search in Google Scholar
Pennella, F., M. Rossi, et al. 2012. “Numerical and Experimental Characterization of a Novel Modular Passive Micromixer.” Biomedical Microdevices 14 (5): 849–62.10.1007/s10544-012-9665-4Search in Google Scholar PubMed
Ruijin, W., L. Beiqi, et al. 2017. “Investigation on the Splitting-Merging Passive Micromixer Based on Baker’s Transformation.” Sensors and Actuators B: Chemical 249: 395–404.10.1016/j.snb.2017.04.087Search in Google Scholar
Shi, Y., S. Xiong, et al. 2018. “Nanometer-Precision Linear Sorting with Synchronized Optofluidic Dual Barriers.” Science Advances 4 (1).10.1126/sciadv.aao0773Search in Google Scholar PubMed PubMed Central
Shi, Y. Z., S. Xiong, et al. 2018. “Sculpting Nanoparticle Dynamics for Single-Bacteria-Level Screening and Direct Binding-Efficiency Measurement.” Nature Communications 9 (1): 815.10.1038/s41467-018-03156-5Search in Google Scholar PubMed PubMed Central
Sinton, D. 2014. “Energy: The Microfluidic Frontier.” Lab on a Chip 14 (17): 3127–34.10.1039/C4LC00267ASearch in Google Scholar
Ter Schiphorst, J., G. G. Melpignano, et al. 2018. “Photoresponsive Passive Micromixers Based on Spiropyran Size-Tunable Hydrogels.” Macromolecular Rapid Communications 39 (1): 1700086.10.1002/marc.201700086Search in Google Scholar
Wang, X., X. Chen, et al. 2011. “Fast DNA Hybridization on a Microfluidic Mixing Device Based on Pneumatic Driving.” Talanta 84 (2): 565–71.10.1016/j.talanta.2011.01.065Search in Google Scholar
Wen, M., C. N. Kim, and Y. Yan. 2016. “Mixing of Two Different Electrolyte Solutions in Electromagnetic Rectangular Mixers.” Journal of Hydrodynamics 28 (1): 114–24.10.1016/S1001-6058(16)60613-3Search in Google Scholar
Whitesides, G. M. 2006. “The Origins and the Future of Microfluidics.” Nature 442 (7101): 368.10.1038/nature05058Search in Google Scholar PubMed
Zhang, K., S. Guo, et al. 2011. “Realization of Planar Mixing by Chaotic Velocity in Microfluidics.” Microelectronic Engineering 88 (6): 959–63.10.1016/j.mee.2010.12.029Search in Google Scholar
Zhang, K., X. J. Mi, and M. Z. Yu. 2012. “Design of Super-efficient Mixer Based on Induced Charge Electroosmotic.” Thermal Science 16 (5): 1534–38.10.2298/TSCI1205534ZSearch in Google Scholar
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