Thermo-Fluidics of Solid Ink-Solid Surface Interaction
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Transcript of Thermo-Fluidics of Solid Ink-Solid Surface Interaction
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Thermo-Fluidics of Solid Ink-Solid Surface Interaction
Sunny Ri Li and Nasser Ashgriz
Department of Mechanical and Industrial Engineering
University of Toronto
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Experimental setup
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Experimental setup
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Major Components
High-speed Video Camera
LabView, PXI board and SCXI Signal Conditioner
Substrate with heater mounted on a linear-movement and tilt and rotation stage
Lighting Sources
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Setup for impaction
The substrate surface is 5 mm away from the print head..
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Droplet Impaction on 23 oC Substrate
Diameter: 269 microns (100 droplets)Droplet speed: 1.59m/s
Diameter: 178 microns (50 droplets) Droplet speed: 1.59m/s
Height: 28.5 microns Width: 51.6microns (1 droplet)Droplet speed: 0.65~1 m/s
Contact angle: 70 deg.
Height: 46.8 microns Width: 101.1 microns (10 droplets)Droplet speed: 0.65~1 m/s
Contact angle: 70 deg.
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Arrest of advancing contact line
Time: t (1 droplet)
Time: t+3/4000 sec. (2 droplets)
Time: t+6/4000 sec. (3 droplets)
Time: t+15/4000 sec. (6 droplets)
Time: t+15/4000 sec. (6 droplets)
Time: t+29/4000 sec. (10 droplets)
Time: t+117/4000 sec. (40 droplets)
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Droplet Impaction on Heated Substrate
Temperature of the substrate: 60 oC(20 droplets)
Contact angle: 60 deg.Temperature of the substrate: 78 oC; 1 droplet Contact angle: 48 deg.
Temperature of the substrate: 90 oC(10 droplets)
Contact angle: 25 deg.
Time: t
Time: t+1/8000 sec.
Time: t+2/8000 sec.
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Impaction of large wax drop
Drop diameter: 2.89mm; Velocity: 0.92m/s; We=70.4; Temperature of substrate: 40 oC Temperature of drop: 85 oC
Drop diameter: 1.98mm; Velocity: 0.5m/s; We=14.3; Temperature of substrate: 40 oC Temperature of drop: 85 oC
Wax drop impacting on an aluminum surface
Wax drop impacting on another solidified drop
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Setup for Visualizing Ink Ejection