Volume 19, Issue 4 (2019)                   Modares Mechanical Engineering 2019, 19(4): 1009-1020 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Hosseini Dehshiri S, Talebi S. Examining the Performance of New Double L-Shaped Micromixer Type. Modares Mechanical Engineering. 2019; 19 (4) :1009-1020
URL: http://journals.modares.ac.ir/article-15-23390-en.html
1- Mechanical Engineering Faculty, Yazd University, Yazd, Iran
2- Mechanical Engineering Faculty, Yazd University, Yazd, Iran , talebi_s@yazd.ac.ir
Abstract:   (1486 Views)

New passive double L-shaped micromixers have been investigated based on the split and recombination flow. Numerical study on micromixers was performed in the Reynolds number range of 50 to 200. The three-dimensional Navier-Stokes equations have been used to analyze flow and mixing behavior. Two different configurations from the positioning of L units have been investigated and two solutions have been proposed to improve the mixing index. If two L units are same shaped, aligned on one plate (design 1), the mixing index is low due to inappropriate split and recombination. The placement of two L units of the same shape on a two-plane parallel and non-aligned (design 2) improve the mixing index and increase to over 95% in Reynolds numbers of 100, 150, and 200. The orthogonal solution to the inputs did not affect the pressure drop and only in design 1, the mixing index could exceed 95% in all Reynolds numbers. Unbalanced micromixer solution improves mixing index by increasing pressure drop. The effect of geometric parameter of asymetric width ratio in both designs was studied and design 1 in asymetric width ratio 2.5 and design 2 in asymetric width ratio 2 and 2.5 have been completely mixed in all Reynolds numbers. Also, the performance of proposed micromixers was better than L-shaped micromixer due to the split and recombination mechanism. In addition, the mixing index was higher in porposed micromixers compared to the split and recombined micromixers of previous researchers due to the use of L-shaped units.
 

Full-Text [PDF 824 kb]   (1378 Downloads)    

Received: 2018/07/22 | Accepted: 2018/11/27 | Published: 2019/04/6

References
1. Stone HA, Stroock AD, Ajdari A. Engineering flows in small devices: Microfluidics toward a lab-on-a-chip. Annual Review of Fluid Mechanics. 2004;36:381-411. [Link] [DOI:10.1146/annurev.fluid.36.050802.122124]
2. Yager P, Edwards T, Fu E, Helton K, Nelson K, Tam MR, et al. Microfluidic diagnostic technologies for global public health. Nature. 2006;442(7101):412-418. [Link] [DOI:10.1038/nature05064]
3. Vijayendran RA, Motsegood KM, Beebe DJ, Leckband DE. Evaluation of a three-dimensional micromixer in a surface-based biosensor. Langmuir. 2003;19(5):1824-1828. [Link] [DOI:10.1021/la0262250]
4. Yaralioglu GG, Wygant IO, Marentis TC, Khuri-Yakub BT. Ultrasonic mixing in microfluidic channels using integrated transducers. Analytical Chemistry. 2004;76(13):3694-3698. [Link] [DOI:10.1021/ac035220k]
5. Wu Z, Nguyen NT. Convective-diffusive transport in parallel lamination micromixers. Microfluidics and Nanofluidics. 2005;1(3):208-217. [Link] [DOI:10.1007/s10404-004-0011-x]
6. Lee CY, Wang WT, Liu CC, Fu LM. Passive mixers in microfluidic systems: A review. Chemical Engineering Journal. 2016;288:146-160. [Link] [DOI:10.1016/j.cej.2015.10.122]
7. Chen X, Shen J. Simulation and experimental analysis of a SAR micromixer with F-shape mixing units. Analytical Methods. 2017;9(12):1885-1890. [Link] [DOI:10.1039/C7AY00022G]
8. Rabani R, Talebi Sh, Rabani M. Numerical analysis of lamination effect in a vortex micro T-mixer with non-aligned inputs. Heat and Mass Transfer. 2016;52(3):611-619. [Link] [DOI:10.1007/s00231-015-1584-5]
9. Chung CK, Shih TR, Wu BH, Chang CK. Design and mixing efficiency of rhombic micromixer with flat angles. Microsystem Technologies. 2010;16(8-9):1595-1600. [Link] [DOI:10.1007/s00542-009-0980-5]
10. Ansari MA, Kim KY, Anwar K, Kim SM. A novel passive micromixer based on unbalanced splits and collisions of fluid streams. Journal of Micromechanics and Microengineering. 2010;20(5):055007. [Link] [DOI:10.1088/0960-1317/20/5/055007]
11. Viktorov V, Nimafar M. A novel generation of 3D SAR-based passive micromixer: Efficient mixing and low pressure drop at a low Reynolds number. Journal of Micromechanics and Microengineering. 2013;23(5):055023. [Link] [DOI:10.1088/0960-1317/23/5/055023]
12. Hossain Sh, Kim KY. Mixing analysis in a three-dimensional serpentine split-and-recombine micromixer. Chemical Engineering Research and Design. 2015;100:95-103. [Link] [DOI:10.1016/j.cherd.2015.05.011]
13. Schönfeld F, Hessel V, Hofmann C. An optimised split-and-recombine micro-mixer with uniform 'chaotic'mixing. Lab on a Chip. 2004;4(1):65-69. [Link] [DOI:10.1039/B310802C]
14. Chen X, Li T, Li X. Numerical research on shape optimization of microchannels of passive micromixers. IEEE Sensors Journal. 2016;16(17):6527-6532. [Link] [DOI:10.1109/JSEN.2016.2586583]
15. Liu RH, Stremler MA, Sharp KV, Olsen MG, Santiago JG, Adrian RJ, et al. Passive mixing in a three-dimensional serpentine microchannel. Journal of Microelectromechanical Systems. 2000;9(2):190-197. [Link] [DOI:10.1109/84.846699]
16. Kanaris AG, Stogiannis IA, Mouza AA, Kandlikar SG. Comparing the mixing performance of common types of chaotic micromixers: A numerical study. Heat Transfer Engineering. 2015;36(13):1122-1131. [Link] [DOI:10.1080/01457632.2015.987623]
17. Zare P, Talebi Sh. Numerical simulation of an L-shaped micromixer and investigation of the effect of variations of geometrical parameters on its performance. Modares Mechanical Engineering. 2017;17(3):293-304. [Persian] [Link]
18. Lin Y. Numerical characterization of simple three-dimensional chaotic micromixers. Chemical Engineering Journal. 2015;277:303-311. [Link] [DOI:10.1016/j.cej.2015.04.123]
19. Galletti Ch, Roudgar M, Brunazzi E, Mauri R. Effect of inlet conditions on the engulfment pattern in a T-shaped micro-mixer. Chemical Engineering Journal. 2012;185-186:300-313. [Link] [DOI:10.1016/j.cej.2012.01.046]
20. Nguyen NT. Micromixers: Fundamentals, design and fabrication. ?? Edition. Amsterdam: Elsevier; 2008. [Link]
21. Ansari MA, Kim KY. A numerical study of mixing in a microchannel with circular mixing chambers. AIChE Journal. 2009;55(9):2217-2225. [Link] [DOI:10.1002/aic.11833]
22. Ansari MA, Kim KY. Mixing performance of unbalanced split and recombine micomixers with circular and rhombic sub-channels. Chemical Engineering Journal. 2010;162(2):760-767. [Link] [DOI:10.1016/j.cej.2010.05.068]
23. Afzal A, Kim KY. Passive split and recombination micromixer with convergent-divergent walls. Chemical Engineering Journal. 2012;203:182-192. [Link] [DOI:10.1016/j.cej.2012.06.111]
24. Hossain Sh, Kim KY. Mixing analysis of passive micromixer with unbalanced three-split rhombic sub-channels. Micromachines. 2014;5(4):913-928. [Link] [DOI:10.3390/mi5040913]
25. Husain A, Khan FA, Huda N, Ansari MA. Mixing performance of split-and-recombine micromixer with offset inlets. Microsystem Technologies. 2018;24(3):1511-1523. [Link] [DOI:10.1007/s00542-017-3516-4]

Add your comments about this article : Your username or Email:
CAPTCHA

Send email to the article author