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Optimization of Passive Mixer for Enhanced Mixing in a Micro-channel by Using Lattice Bloltzmann Method

격자 볼츠만 방법을 이용한 미소 채널에서의 혼합효율 증가를 위한 수동형 믹서의 최적화

  • 한규석 (한양대학교 대학원 기계공학과) ;
  • 변성준 (한양대학교 대학원 기계공학과) ;
  • 윤준용 (한양대학교 기계정보경영공학부)
  • Published : 2005.05.01

Abstract

In this work, Scalar Passive code in Lattice Boltzmann Method is employed to simulate two-phase flow of low Reynolds number in a micro-channel. The mixing characteristics in a micro-channel is a function of Peclet number. The mixing length increases with the Peclet number. It is found that with the inclusion of static elements at the channel, rapid mixing of two liquids can be achieved, as shown by the results of computer simulations. The enhancement in mixing performance is thought to be caused by the generation of eddies and by lateral velocity component when the mixture flows past static elements. The results indicate that the size of static element has more effect on the mixing than the number of static element.

Keywords

Micro-Mixer;Two-Phase Mixing;Passive Mixer;Mixing Efficiency;Lattice Boltzmann Method

References

  1. Sang-Joon Lee, Jeong-Ki Huh, Guk-bae Kim, Seung Seob Lee, 2002, 'Velocity Field Measurements of Flow inside a Microchannel Using a Micro-PlY' KSME, In: Proceeding of KSME fluid dynamics conference, pp. 1595-1599
  2. Stroock, A.D., Dertinger, S.K.W, Ajdari, A., Mezic, I., Stone, H.A. and Whitesides, G.M., 2002, 'Chaotic Mixer for Microchannels,' Science, Vol. 295, pp. 647-651 https://doi.org/10.1126/science.1066238
  3. Lee, Y., Deval, J., Tabeling, P. and Ho, C, 2001, 'Chaotic Mixing in Electrokinetically and Pressure Driven Micro Flows,' Technical digest of the 14th IEEE into Conf. MEMS., Interlaken, Swizerland, pp. 483-486
  4. Liu, R. H., Mark, A. S., Kendra, V. S., Michael, G. O., Juan, G. S. and Ronald, J. A., 2000, 'Passive Mixing in a Three-Dimensional Serpentine Microchannel,' J. MEMS., Vol. 9, No.2, pp. 190-197 https://doi.org/10.1109/84.846699
  5. Seck Hoe Wong, Patrick Bryant, Michael Ward, Christopher Wharton, 2003, 'Investigation of Mixing in a Cross-Shaped Micromixer with Static Mixing Elements for Reaction Kinetics Studies,' Sensors and Actuators B95, pp. 414-424
  6. Timothy J. Johnson, David Ross, and Laurie E. Locascio, 2002, 'Rapid Microfluidic Mixing,' Anal. Chem, 74, pp. 45-51 https://doi.org/10.1021/ac010895d
  7. Hengzi Wang, Pio Iovenitti, Erol Harvey and Syed Masood, 2002, 'Optimizing Layout of Obstacles for Enhanced Mixing in Microchannels,' Smart Mater. Struct, II, pp. 662-667 https://doi.org/10.1088/0964-1726/11/5/306
  8. Liang-Hsuan Lu, Kee Suk Ryu and Chang Liu, 2002, 'A Magnetic Microstirrer and Array for Microfluidic Mixing,' Journal of MEMS, Vol. 11 No. 5, pp. 462-469 https://doi.org/10.1109/JMEMS.2002.802899
  9. Hiroo Ukita and Motoki Kanehira, 2002, 'A Shuttlecock Optical Rotator-Its Design, Fabrication and Evaluation for a Microfluidic Mixer,' IEEE, Vol. 8, No. 1, pp. 111-117
  10. Yang, Z. L., Dinh, T, N., Nourgaliev, R. R. and Sehgal, B. R., 2000, 'Evaluation of the Darcy's Law Performance for Two-Fluid Flow Hydro Dynamics in a Particle Debris Bed Using a Lattice-Boltzmann Model,' Heat and Mass Transfer, 36, pp. 295-304 https://doi.org/10.1007/s002310000089
  11. Mohamed Gad-el-Hak, 2001, 'Flow Physics in MEMS,' Mec. Ind, 2, pp. 313-341
  12. Ho-Keun Kang, Michihisa tsutahara, Ki-Deok Ro, Young-Ho Lee, 2003, 'Numerical Analysis of a Weak Shock Wave Propagating in a Medium Using Lattice Boltzmann Method,' KSME International Journal, Vol. 17, No. 12, pp. 2034-2041
  13. Sauro Succi, 2001, 'The Lattice Boltzmann Equation for Fluid Dynamics and Beyond,' Clarendon Press-Oxford, pp. 90-91
  14. Jeon N. L., Dertinger S. K W., Chiu D. T., Choi I. S., Stroock A. D. and Whitesided G. M., 2000, 'Generation of Solution and Surface Gradients Using Microfluidic Systems,' Langmuir, 16, pp. 8311-8316 https://doi.org/10.1021/la000600b
  15. Nam-Trung Nguyen, Steven T., Werelsy, 2002, 'Fundamentals and Applications of Microfluidics,' Artech House, INC, pp. 42-44