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Thermo-Fluidics of Solid Ink-Solid Surface Interaction

Experimental setup and results for studying the interaction between solid ink droplets and solid surfaces, including substrate heating, droplet impaction, and ink ejection visualization.

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Thermo-Fluidics of Solid Ink-Solid Surface Interaction

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  1. Thermo-Fluidics of Solid Ink-Solid Surface Interaction Sunny Ri Li and Nasser Ashgriz Department of Mechanical and Industrial Engineering University of Toronto

  2. Experimental setup

  3. Experimental setup

  4. Major Components High-speed Video Camera Substrate with heater mounted on a linear-movement and tilt and rotation stage LabView, PXI board and SCXI Signal Conditioner Lighting Sources

  5. Setup for impaction The substrate surface is 5 mm away from the print head..

  6. Droplet Impaction on 23 oC Substrate 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. Diameter: 178 microns (50 droplets) Droplet speed: 1.59m/s Diameter: 269 microns (100 droplets) Droplet speed: 1.59m/s

  7. Arrest of advancing contact line Time: t (1 droplet) Time: t+15/4000 sec. (6 droplets) Time: t+3/4000 sec. (2 droplets) Time: t+29/4000 sec. (10 droplets) Time: t+6/4000 sec. (3 droplets) Time: t+117/4000 sec. (40 droplets) Time: t+15/4000 sec. (6 droplets)

  8. Temperature of the substrate: 90 oC (10 droplets) Contact angle: 25 deg. Temperature of the substrate: 60 oC (20 droplets) Contact angle: 60 deg. Droplet Impaction on Heated Substrate Time: t Time: t+1/8000 sec. Time: t+2/8000 sec. Temperature of the substrate: 78 oC; 1 droplet Contact angle: 48 deg.

  9. Impaction of large wax drop Wax drop impacting on an aluminum surface Drop diameter: 2.89mm; Velocity: 0.92m/s; We=70.4; Temperature of substrate: 40 oC Temperature of drop: 85 oC Wax drop impacting on another solidified drop Drop diameter: 1.98mm; Velocity: 0.5m/s; We=14.3; Temperature of substrate: 40 oC Temperature of drop: 85 oC

  10. Setup for Visualizing Ink Ejection

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