Abstract
In this work, we report on the impact of flow pulsatility on the laminar mixing surface/interface formed between two converging microchannel flows. The motivation behind the study is to assess the potential for pulsatility as a possible MEMS-mixing strategy. A 3-D computational model of the converging flow at a 90/dg junction is developed using the Fluent6 CFD software and the volume-of-fluid algorithm is used to track time-dependent behavior of the interface downstream of the junction. Results thus far have shown that for certain parametric regimes a complex, evolving interfacial distortion can form which propagates and persists downstream of the junction. Time-series for the total interfacial area and the interfacial motion have been extracted from numerical data and spectral analyses have been performed; some interesting nonlinear behavior has been observed. Of particular importance, the results also show that the complexity of the interfacial structure is only significant at higher frequencies (order of kHz) which is appropriate for MEMS-based pumping devices.
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References
A. Beskok and A.R. Srinivasa, “Simulation and analysis of a magnetoelastically driven micro-pump,” ASME J. of Fluids Engr vol. 123, pp. 435–438, 2001.
X. Geng, H. Yuan, H.N. Oguz, and A. Prosperetti, “Bubble-based micropump for electrically conducting liquids,” J. Micromech. Microeng. vol. 11, pp. 270–276, 2001.
C.E. Hickox, “Instability due to viscosity and density stratification in axisymmetric pipe flow,” Phys. Fluids vol. 14, pp. 251–262, 1971.
D.L. Hitt and M.L. Lowe, “Confocal imaging of fluid flows in microfabricated venular bifurcations,” ASME J. of Biomech. Engr. vol. 121, pp. 170–177, 1999.
C.W. Hirt and B.D. Nichols, “Volume of fluid (VOF) method for the dynamics of free boundaries,” J. Comput. Phys. vol. 39, p. 201, 1981.
D.D. Joseph, M. Renardy and Y. Renardy, Y., “Instability of the flow of two immiscible liquids with different viscosities in a pipe,” J. Fluid Mech. vol. 141, pp. 309–317, 1984.
J.B. Knight, A. Vishwanath, J.P. Brody and R.H. Austin, “Hydrodynamic focusing on a silicon chip: mixing nanoliters in microseconds,” Phys. Rev. Lett. vol. 80, pp. 3863–3866, 1998.
Y.-K. Lee, P. Tabeling, C. Shih and C.-M. Ho, “Characterization of a MEMS-fabricated mixing device, ” Microelectromechanical Systems (MEMS) 2000, MEMS vol. 2, Proceedings of the 2000 ASME International Mechanical Engineering Congress & Exposition, pp. 505–511, 2000.
J.P. Peach, D.L. Hitt and C.T. Dunlap, “Three-dimensional imaging of microfluidic mixing Surfaces using dual-channel confocal microscopy,” Microelectromechanical Systems (MEMS) 2000-MEMS vol. 2, Proceedings of the 2000 ASME International Mechanical Engineering Congress & Exposition, pp. 497–504, 2000.
K.P. Selverov and H.A. Stone, “Peristaltically driven channel flows with applications toward micromixing,” Phys. Fluids, vol. 13, pp. 1837–59, 2001.
A.D. Stroock, S.K.W. Dertinger, A. Adjari, I. Mezi, H.A. Stone, and G.M. Whitesides, “Chaotic mixer for microchannels,” Science vol. 295 (2002), p. 647.
M. Yi and H.H. Bau, “The kinematics of bend-induced stirring in micro-conduits,” Microelectromechanical Systems (MEMS) 2000, MEMS vol. 2, Proceedings of the 2000 ASME International Mechanical Engineering Congress & Exposition, pp. 489–496, 2000.
D.L. Youngs, “Time-dependent multi-material flow with large fluid distortion,” in Numerical Methods for Fluid Dynamics, K.W. Morton and M.J. Baines, eds., Academic Press, 1982.
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McGarry, M., Hitt, D.L. (2003). Numerical Simulation of Laminar Mixing Surfaces in Converging Microchannel Flows. In: Kumar, V., Gavrilova, M.L., Tan, C.J.K., L’Ecuyer, P. (eds) Computational Science and Its Applications — ICCSA 2003. ICCSA 2003. Lecture Notes in Computer Science, vol 2668. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44843-8_91
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DOI: https://doi.org/10.1007/3-540-44843-8_91
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