1. Microfluidics
Mixing
Chamber

2. Where? / With Whom?
Intro to Project
Proposal
How?

3. Micro-Fabrication Facility (MFF)
Dr. Michael Khbeis
Kristopher Lawler
Andy Lingley
Class cleanroom -> Class 100
11,500 sq ft of wet & dry lab space
Photolithography
Nanolithography
Dry Etch
PVD
CVD
Thermal processing
Metrology

4. How is microfluidic mixing different?
[5]
Turbulent
Laminar

5. Reynolds Number[2]
Re = (ρ * V * L) / mu
Dimensionless measure of the ratio of inertia force to viscous force
Inertial forces = density (ρ) * velocity (V) * gradient of the velocity (dV/dx)
Viscous forces = dynamic viscosity coefficient (μ) * second gradient of the velocity (d2V/dx2)
High Reynolds numbers - turbulent mixing
Low Reynolds numbers - mixing relies on diffusion
0.1 = (1000kg/m3 * m * 0.001m/s) [1] 0.001Ns/m2

6. Passive Microfluidic Mixers[1]
Lamination
Intersecting Channels
Zigzag Channels
Three-Dimensional Serpentine Structures
Embedded Barriers
Slanted Wells
Surface-Chemistry Technology in Microchannels

7. Laminar mixing
[1]
Diffusion limited
Takes time and distance

8. Intersecting and Zigzag Channels
[1]
[1]

9. Three-Dimensional Serpentine Structures and Grooves
[1]

10. Embedded Barriers
[4]

11. Hong Chamber
[6]

12. Questions?

13. [7]

15. Works Cited
Lee CY, Chang CL, Wang YN, Fu LM (2011) Microfluidic mixing: a review. Int J Mol Sci 12: 3263–3287.
Benson, Tom. "Reynolds Number." Reynolds Number. NASA.gov, 22 May Web. 18 Apr <
De Buryn Kops, Steve, and Jim Riley. "Turbulent Mixing." EFluids Gallery Image and Description. EFluids.com, n.d. Web. 18 Apr <
"Injection Molding Static Mixing Nozzle (Type SMN)." - StaMixCo Polymer Melt Viscous Processing Static Mixer Products & Technology. Stamixco-usa.com, n.d. Web. 18 Apr <
"Mass Transport · Teaching Notes." Department of Chemical Engineering and Biotechnology. University of Cambridge, Web. 18 Apr <
"Microfluidic CFD Applications: Multiphase Mixing and Bubble Dynamics." Microfluidics Applications: Simulating Multiphase Mixing. Flow Science, n.d. Web. 19 Apr <
Applied Physical Sciences - Chemistry: Andres W. Martinez, Scott T. Phillips, and George M. Whitesides Three-dimensional microfluidic devices fabricated in layered paper and tape PNAS (50) ; published ahead of print December 8, 2008, doi: /pnas