Numerical Analysis Of Mixing Under Low And High Frequency Pulsations At Serpentine Micromixers

• Autorzy: Malecha Z. M. , Malecha K.

Identyfikatory

DOI

10.2478/cpe-2014-0028

• Języki publikacji: EN

Abstrakty

EN

The numerical investigation of the mixing process in complex geometry micromixers, as a function of various inlet conditions and various micromixer vibrations, was performed. The examined devices were two-dimensional (2D) and three-dimensional (3D) types of serpentine micromixers with two inlets. Entering fluids were perturbed with a wide range of the frequency (0 – 50 Hz) of pulsations. Additionally, mixing fluids also entered in the same or opposite phase of pulsations. The performed numerical calculations were 3D to capture the proximity of all the walls, which has a substantial influence on microchannel flow. The geometry of the 3D type serpentine micromixer corresponded to the physically existing device, characterised by excellent mixing properties but also a challenging production process (Malecha et al., 2009). It was shown that low-frequency perturbations could improve the average mixing efficiency of the 2D micromixer by only about 2% and additionally led to a disadvantageously non-uniform mixture quality in time. It was also shown that high-frequency mixing could level these fluctuations and more significantly improve the mixing quality. In the second part of the paper a faster and simplified method of evaluation of mixing quality was introduced. This method was based on calculating the length of the contact interface between mixing fluids. It was used to evaluate the 2D type serpentine micromixer performance under various types of vibrations and under a wide range of vibration frequencies.

Słowa kluczowe

EN

serpentine micromixer; active mixing; numerical simulations; LTCC technology

PL

aktywne mieszanie; symulacja numeryczna; technologia LTCC

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2014
• Tom: Vol. 35, nr 3
• Strony: 369--385
• Opis fizyczny: Bibliogr. 24 poz., rys., tab.

Twórcy

autor

Malecha Z. M.

• University of New Hampshire, Program in Integrated Applied Mathematics, Durham, NH 03824, USA
• Wrocław University of Technology, Department of Cryogenic, Aviation and Process Engineering, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

autor

Malecha K.

• Wrocław University of Technology, Faculty of Microsystem Electronics and Photonics, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

Bibliografia

• 1. Bałdyga J., Bourne, J. R., 1984. Mixing and fast chemical reaction-VIII: Initial deformation of material elements in isotropic, homogeneous turbulence. Chem. Eng. Sci., 39, 329-334. DOI: 10.1016/0009-2509(84)80031-7.
• 2. Batchelor G.K., 2000, An Introduction to Fluid Dynamics. Cambridge University Press, Cambridge (UK).
• 3. Dziuban J.A., Mróz J., Szczygielska M., Małachowski M., Górecka-Drzazga A., Walczak R., Buła W., Zalewski D., Nieradko L., Łysko J., Kosztur J., Kowalski P., 2004. Portable gas chromatograph with integrated components. Sens. Actuators A, 115, 318-330. DOI: 10.1016/j.sna.2004.04.028.
• 4. Glasgow I., Aubry N., 2003. Enhancement of microfluidic mixing using time pulsing. Lab Chip, 3, 114-120. DOI: 10.1039/B302569A.
• 5. Gravesen P., Branebjerg J., Jensen O.S., 1993. Microfluidics – A review. J. Micromech. Microeng., 3, 168-182. DOI: 10.1088/0960-1317/3/4/002.
• 6. Groß G., Thelemann T., Schneider S., Boskovic D., Kohler J., 2008. Fabrication and fluidic characterization of static micromixer made of low temperature cofired ceramic (LTCC). Chem. Eng. Sci., 63, 2773-2784. DOI:10.1016/j.ces.2008.02.030.
• 7. Hessel V., Lowe H., Schonfeld F., 2005. Micromixer a review on passive and active mixing principles. Chem. Eng. Sci., 60, 2479-2501. DOI: 10.1016/j.ces.2004.11.033.
• 8. Kudela H., Malecha Z.M., 2009. Eruption of a boundary layer induced by a 2D vortex patch. Fluid Dyn. Res., 41, 055502. DOI: 10.1088/0169-5983/41/5/055502.
• 9. Liu P., Li X., Greenspoon S.A., Scherer J.R., Mathies R.A., 2011. Integrated DNA purification, PCR, sample cleanup, and capillary electrophoresis microchip for forensic human identification. Lab Chip, 11, 1041-1048. DOI: 10.1039/c0lc00533a.
• 10. Malecha K., 2013. A PDMS-LTCC bonding using atmospheric pressure plasma for microsystem applications. Sens. Actuators B, 181, 486-493. DOI: 10.1016/j.snb.2013.01.094.
• 11. Malecha K., Golonka L.J., Bałdyga J., Jasińska M., Sobieszuk P., 2009. Serpentine microfluidic mixer made In LTCC. Sens. Actuators B, 143, 400-413. DOI: 10.1016/j.snb.2009.08.010.
• 12. Malecha K., Pijanowska D.G., Golonka L.J., Kurek P., 2011. Low temperature co-fired ceramic (LTCC)-based biosensor for continuous glucose monitoring. Sens. Actuators B, 155, 923-929. DOI: 10.1016/j.snb.2011.01.002.
• 13. Malecha Z.M., Chorowski M., Polinski J., 2013. Numerical study of emergency cold helium relief into tunnel using a simplified 3D model. Cryogenics, 57, 181-188. DOI: 10.1016/j.cryogenics.2013.07.006.
• 14. Malecha Z.M., Mirosław L., Tomczak T., Koza Z., Matyka M., Tarnawski W., Szczerba D., 2011. GPU-based simulation of 3D blood flow in abdominal aorta using openfoam. Archives of Mechanics, 63, 137-161.
• 15. Manz A., Graber N., Widmer M., 1990. Miniaturized total chemical analysis systems: A novel concept for chemical sensing. Sens. Actuators B, 1, 244-248. DOI: 10.1016/0925-4005(90)80209-I.
• 16. Monnery W.D., Svrcek W.Y., Mehrotra A.K., 1995. Viscosity: A critical review of practical predictive and correlative methods. Can. J. Chem. Eng., 73, 3-40. DOI: 10.1002/cjce.5450730103.
• 17. Neild A., Wah Ng T., Sheard G.J., Powers M., Oberti S., 2010. Swirl mixing at microfluidic junctions due to low frequency side channel fluidic perturbations. Sens. Actuators B, 150, 811-818. DOI: 10.1016/j.snb.2010.08.027.
• 18. Nguyen N.-T., 2012. Micromixers: Fundamentals, design and fabrication. 2nd edition, Elsevier, Oxford (UK).
• 19. Nguyen N.-T., Wu Z., 2005. Micromixers - A review. J. Micromech. Microeng., 15, R1-R16. DOI: 10.1088/0960-1317/15/2/R01.
• 20. Oberti S., Neild A., Wah Ng T., 2009. Microfluidic mixing under low frequency vibration. Lab Chip, 9, 1435-1438. DOI: 10.1039/b819739c.
• 21. OpenFOAM, 2009. The Open Source CFD Toolbox User Guide.
• 22. Ottino J.M., Wiggins S., 2004. Introduction: Mixing in microfluidics. Phil. Trans. R. Soc. Lond. A, 362, 923-935. DOI: 10.1098/rsta.2003.1355.
• 23. Wiggins S., Ottino J.M., 2004. Foundations of chaotic mixing. Phil. Trans. R. Soc. Lond. A, 362, 937-970. DOI: 10.1098/rsta.2003.1356.
• 24. Yi M., Bau H.H., 2003. The kinematics of bend-induced mixing in microconduits. Int. J. Heat Fluid Flow, 24, 645-656. DOI: 10.1016/S0142-727X(03)00026-2.