پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 11 |
| تعداد شماره‌ها | 210 |
| تعداد مقالات | 2,098 |
| تعداد مشاهده مقاله | 2,877,270 |
| تعداد دریافت فایل اصل مقاله | 2,085,048 |
Investigation of electrokinetic mixing in 3D non-homogenous microchannels | ||
| Journal of Computational & Applied Research in Mechanical Engineering (JCARME) | ||
| مقاله 4، دوره 3، شماره 1، اسفند 2013، صفحه 41-52 اصل مقاله (2.76 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22061/jcarme.2013.58 | ||
| نویسندگان | ||
| J. Jamaati* 1؛ H. Niazmand2؛ M. Renksizbulut3 | ||
| 1Razi University, Department of Mechanical Engineering, Kermanshah, Iran | ||
| 2Ferdowsi University of Mashhad, Department of Mechanical Engineering, Mashhad, Iran | ||
| 3University of Waterloo, Department of Mechanical & Mechatronics Engineering, Waterloo, Canada | ||
| تاریخ دریافت: 27 بهمن 1390، تاریخ بازنگری: 22 اسفند 1391، تاریخ پذیرش: 01 فروردین 1392 | ||
| چکیده | ||
| A numerical study of 3D electrokinetic flows through micromixers was performed. The micromixers considered here consisted of heterogeneous rectangular microchannels with prescribed patterns of zeta-potential at their walls. Numerical simulation of electroosmotic flows within heterogeneous channels requires solution of the Navier-Stokes, Ernest-Plank and species concentration equations. It is known that a 3D solution of these equations is computationally very intensive. Therefore, the well-known Helmholtz-Smoluchowski model is often used in numerical simulation of electroosmotic flows. According to 2D studies on electrokinetic mixing inside heterogeneous channels, existence of vortices within the flow field always increases mixing performance. Hence, it may be expected that similar observations pertain to mixing in 3D flows as well. However, investigations on 3D micromixers identified situations in which existence of vortices had little or no significant benefit to the mixing performance. Findings of the present work indicated degree of flow asymmetry as a key parameter for the mixing performance. Since 3D flows are more capable of developing asymmetrical flow patterns, they are expected to have better mixing performance than their 2D counterparts. The results presented here for different 3D cases showed that mixing performance could be improved significantly depending on the alignment of vortex plane relative to the mixing interface of the fluids. These observations confirmed that 2D simulations of mixing could not fully explain behavior of passive micromixers. | ||
| کلیدواژه‌ها | ||
| Mixing؛ Electroosmotic؛ Helmholtz-Smoluchowski model؛ Non-homogeneous | ||
| مراجع | ||
|
[1] J.K. Chen, W.J. Luo, and R.J. Yang, “Electroosmotic flow driven by DC and AC electric fields in curved microchannels”, Jap J Appl Phys, Vol. 45, pp. 7983–7990, (2006).
[2] G.M. Whitesides, and A.D. Stroock, “Flexible methods for microfluidics”, Phys. Today, Vol. 54, pp. 42–50, (2001).
[3] H.A. Stone, A.D. Stroock, and A. Ajdari, “Engineering flows in small devices: microfluidics towards a lab-on-a-chip”, Annu. Rev. Fluid Mech. Vol. 36, pp. 381–411, (2004).
[4] T. Vilkner, D. Janasek, and Manz A., “Micro total analysis systems”, Recent Developments Anal. Chem., Vol. 76, pp. 3373–86, (2004).
[5] C.C. Chang, and R.J. Yang, “Electrokinetic mixing in Microfluidic systems”, Microfluid Nanofluid, Vol. 3, pp. 501–525, (2007).
[6] J. M. Chen, T.L. Horng, and W.Y. Tan, “Analysis and measurements of mixing in pressure-driven microchannel flow”, Microfluid Nanofluid, Vol. 2, pp. 455–469, (2006).
[7] D.P.J. Barz, H.F. Zadeh, and P. Ehrhard, “3D simulations and experiments of flow in a folded microchannel”, PAMM Proc. Appl. Math. Mech., Vol. 6, pp. 559–560,(2006).
[8] S.H. Wong, and M.C.L. Ward, and C.W. Wharton, “Micro T-mixer as a rapid mixing micromixer”, Sensors Actuators B, Vol. 100, pp. 365–385,(2004).
[9] J.B. Knight, A. Vishwanath, J.P. Brody, and R.H. Austin, “Hydrodynamic focusing on a silicon chip: mixing nanoliters in microseconds”, Physical Review Lett, Vol. 80, pp. 3863–3866, (1998).
[10] R.J. Yang, C.C. Chang, S.B. Huang, and G.B. Lee, “A new focusing model and switching approach for electrokinetic flow inside microchannels”, Micromech Microeng, Vol. 15, pp. 2141–2148, (2005).
[11] S. Hardt, H. Pennemann, and F. Schönfeld, “Theoretical and experimental characterization of a low-Reynolds number split and recombine mixer”, Microfluid Nanofluid, Vol. 2, pp. 237–248, (2006).
[12] H. Aref, “Stirring by chaotic advection”, J. Fluid Mechanics, 143, pp. 1–21, (1984).
[13] J. Ou, G.R. Moss, and J.P. Rothstein, “Enhanced mixing in laminar flows using ultrahydrophobic surfaces”, Physical Review E, Vol. 76, pp. 016304, (2007).
[14] P.B. Howell Jr, D.R. Mott, F.S. Ligler, J.P. Golden, C.R. Kaplan, and E.S. Oran, “A combinatorial approach to microfluidic Mixing”, J. Micromech. Microeng., Vol. 18, pp. 115019-115026, (2008).
[15] J. Zhang, G. He, and F. Liu, “Electro-osmotic flow and mixing in heterogeneous microchannels”, Physical Review E, Vol. 73, pp. 056305, (2006).
[16] Y.K. Lee, L.M. Lee, W.L.W. Hau, and Y. Zohar, “Two-dimensional analysis of electrokinetically driven out-of-plane vortices in a microchannel liquid flow using patterned surface charge”, MEMS, Vol. 16, pp. 58–67, (2007).
[17] K. Horiuchi, P. Dutta, and C.F. Ivory, “Electroosmosis with step changes in zeta-potential in microchannels”, AIChE, Vol. 53, pp. 2521–2533, (2007).
[18] D. Erickson, and D. Li, “Influence of Surface Heterogeneity on Electrokinetically Driven Microfluidic Mixing”, Langmuir, Vol. 18, pp. 1883–1892, (2002).
[19] K. Fushinobu, and M. Nakata, “An experimental and numerical study of a liquid mixing device for Microsystems”, Trans. ASME J Electronic Packaging, Vol. 127, pp. 141–146, (2005).
[20] L.M. Lee, W.L.W. Hau, Y.K. Lee, and Y. Zohar, “In-plane vortex flow in microchannels generated by electroosmosis with patterned surface charge”, J Micromech. Microeng, Vol. 16, pp. 17–26, (2006).
[21] S. Qian, H.H. Bau, “A chaotic electroosmotic stirrer”, Anal Chem., Vol. 74, pp. 3616–3625, (2002).
[22] C.K. Chen, and C.C. Cho, “Electrokinetically driven flow mixing utilizing chaotic electric fields”, Microfluid Nanofluid, Vol. 5, pp. 785–793, (2008).
[23] C.C. Chang, and R.J. Yang, “A particle tracking method for analyzing chaotic electroosmotic flow mixing in 3-D microchannels with patterned charged surfaces”, J Micromech Microeng, Vol. 16, pp. 1453–1462, (2006).
[24] S.A. Mirbozorgi, H. Niazmand, and M. Renksizbulut, “Electro-osmotic flow in reservoir-connected flat microchannel with non-uniform zeta-potential”, J. Fluids Engineering, Transactions of the ASME, Vol. 128(6), pp. 1133–1143, (2006).
[25] J.C. Ramirez, and A.T. Conlisk, “Formation of vortices near abrupt nano-channel height changes in electro-osmotic flow of aqueous solutions”, Biomed Microdevices, Vol. 8, pp. 235–330, (2006).
[26] I. Meisel, and P. Ehrhard, “Electrically-excited (electroosmotic) flows in microchannels for mixing applications”, European Journal of Mechanics B/Fluids, Vol. 25, pp. 491–504, (2006).
[27] E.B. Cummings, S.K. Griffiths, R.H. Nilson, and P.H. Paul, “Conditions for similitude between the fluid velocity and electric field in electroosmotic flow”, Anal. Chem., Vol. 72, pp. 2526–2532, (2000).
[28] J.G. Santiago, “Electroosmotic flows in microchannels with finite inertial and pressure forces”, Anal. Chem., Vol. 73, pp. 2353–2365,( 2001).
[29] A.D. Stroock, M. Weck, D.T. Chiu, W.T.S. Huck, P.J.A. Kenis, R.F. Ismagilov, and G.M. Whitesides, “Patterning electro-osmotic flow with patterned surface charge”, Physical Review Letters, Vol. 84(15), pp. 3314, (2000).
[30] J. Park, B. Kim, “3D micro patterning on a concave substrate for creating the replica of a cylindrical PDMS stamp”, Microelectronic Engineering, DOI: 10.1016/j.mee.2012.07.034, (2012).
[31] N. Loucaides, A. Ramos, G.E. Georghiou, “Configurable AC electroosmotic pumping and mixing”, Microelectronic Engineering, Vol. 90, pp. 47-50 (2012).
[32] J.R. Pacheco, A. Pacheco-Vega, and K. P. Chen, “Mixing-dynamics of a passive scalar in a three-dimensional microchannel”, Int. J Heat and Mass Trans., Vol. 54, pp. 959–966, (2011).
[33] C. Simonnet, and A. Groisman, “Chaotic mixing in a steady flow in a microchannel”, Physical Review Letters, Vol. 94, pp. 134501, (2005).
[34] M. Camesasca, I. Manas-Zloczower, and M. Kaufman, “Entropic characterization of mixing in microchannels”, J Micromech. Microeng., Vol. 15, pp. 2038–2044, (2005).
[35] T.G. Kang, and T.H. Kwon, “Mixing analysis of chaotic micromixers”, J Micromech. Microeng., Vol. 14, pp. 891–899, (2004).
[36] N.S. Lynn, C.S. Henry, and D.S. Dandy, “Microfluidic mixing via transverse electrokinetic effects in a planar microchannel”, Microfluid Nanofluid, Vol. 5, pp. 493–505, (2008).
[37] D. Wang, J.L. Summers, and P.H. Gaskell, “Modeling of electrokinetically driven mixing flow in microchannels with patterned blocks”, Computers and Mathematics with Applications, Vol. 55(7), pp. 1601-1610, (2008).
[38] C.C. Chang, and R.J. Yang, “Computational analysis of electrokinetically driven flow mixing in microchannels with patterned blocks”, J Micromech. Microeng., Vol. 14(4), pp. 550-558, (2004). | ||
|
آمار تعداد مشاهده مقاله: 2,323 تعداد دریافت فایل اصل مقاله: 1,612 |
||