REU Student: Naveed PayaAffiliation: Cornell University
Incompressible, laminar fluid flow at low Reynolds number
Fluid streams behave almost like solid objects
Rapid mixing is essential, but…
No chaotic flow or turbulenceNo stirring capabilitySlow diffusion: t = h2/D
Fluidic channel opening
Gold‐coated Mylar film
Welded region
+_Voltage source
Design a novel compliant micromixerSelective welding of Mylar filmAdd hollow LDPE tubes for inlets/outletAttach to LDPE rings and heat seal for mechanical support
Advantage over PDMS: Easy, inexpensive, compliant!
31 mm
17 mm
1 mm
3 mm
50 mm
(a) (b) (c)
1 mm
Max volume: 95 μL
1 2 3 4 5 6
7 8 9 10 11 12
13 14 15 16 17 18
Aqueous solutionsViscosity: 1 cps
Density: 1.0 kg/LReynolds number ~ 85
0 0.2 0.4 0.6 0.8 1 1.2 1.40
20
40
60
80
100
120
Time (sec)
RG
B P
ixel
Val
ue
Mixing Analysis of Blue and Yellow Liquid
SAE 30 motor oilViscosity: 105 cps
Density: 0.88 kg/LReynolds number < 1
1 2 3 4 5
6 7 8 9 10
Compliant voltage‐actuated micromixer
2 electrically isolated chamber halves3 electrodes
Theory of operationPump fluid through inletsSqueeze one half by applying voltageRelease and squeeze the other half
National Science Foundation, Department of Defense Grant NSF‐EEC 0755115
Prof. Alan FeinermanMs. Tatjana Dankovic
Prof. C. TakoudisProf. G. JursichMs. Yi Yang
Questions
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