reu student naveed paya affiliation: cornell university · design a novel compliant micromixer...

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REU Student: Naveed Paya Affiliation: Cornell University

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Page 1: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

REU Student: Naveed PayaAffiliation:  Cornell University

Page 2: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

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

Page 3: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

Fluidic channel opening 

Gold‐coated Mylar film

Welded region

+_Voltage source

Page 4: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

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)

Page 5: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

1 mm

Max volume: 95 μL 

Page 6: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

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

Page 7: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

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

Page 8: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

SAE 30 motor oilViscosity: 105 cps

Density: 0.88 kg/LReynolds number < 1

1 2 3 4 5

6 7 8 9 10

Page 9: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

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

Page 10: REU Student Naveed Paya Affiliation: Cornell University · Design a novel compliant micromixer Selective welding of Mylar film Add hollow LDPE tubes for inlets/outlet Attach to LDPE

National Science Foundation, Department of Defense Grant NSF‐EEC 0755115

Prof. Alan FeinermanMs. Tatjana Dankovic

Prof. C. TakoudisProf. G. JursichMs. Yi Yang

Questions