REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer...
Transcript of REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer...
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REU Student: Naveed PayaAffiliation: Cornell University
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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
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Fluidic channel opening
Gold‐coated Mylar film
Welded region
+_Voltage source
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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)
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1 mm
Max volume: 95 μL
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Aqueous solutionsViscosity: 1 cps
Density: 1.0 kg/LReynolds number ~ 85
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0 0.2 0.4 0.6 0.8 1 1.2 1.40
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Time (sec)
RG
B P
ixel
Val
ue
Mixing Analysis of Blue and Yellow Liquid
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SAE 30 motor oilViscosity: 105 cps
Density: 0.88 kg/LReynolds number < 1
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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
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National Science Foundation, Department of Defense Grant NSF‐EEC 0755115
Prof. Alan FeinermanMs. Tatjana Dankovic
Prof. C. TakoudisProf. G. JursichMs. Yi Yang
Questions