The effect of substrate temperature on the splashing of molten metal droplets was studied experimentally. Uniform-size molten tin droplets (550 μm diameter) were produced using a drop-on-demand generator. To achieve high impact velocities substrates were mounted on the rim of a rotating flywheel and heated using cartridge heaters to vary substrate temperature. Droplets hitting a smooth cold substrate splashed extensively producing many small satellite droplets and leaving on the surface a small, irregular splat with many fingers projecting from its periphery. Droplets hitting a hot substrate did not splash but spread out to form a smooth disc. A new splashing criterion was developed to calculate the substrate temperature at which this transition occurred. It assumes splashing to occur when the solid layer produced as a result of droplet solidification grows equal to the splat thickness and obstructs the spreading liquid.
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ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
July 11–15, 2004
Charlotte, North Carolina, USA
Conference Sponsors:
- Heat Transfer Division and Fluids Engineering Division
ISBN:
0-7918-4690-3
PROCEEDINGS PAPER
Effect of Substrate Temperature on Splashing of Molten Metal Droplets Available to Purchase
Rajeev Dhiman,
Rajeev Dhiman
University of Toronto, Toronto, ON, Canada
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Sanjeev Chandra
Sanjeev Chandra
University of Toronto, Toronto, ON, Canada
Search for other works by this author on:
Rajeev Dhiman
University of Toronto, Toronto, ON, Canada
Sanjeev Chandra
University of Toronto, Toronto, ON, Canada
Paper No:
HT-FED2004-56096, pp. 71-78; 8 pages
Published Online:
February 24, 2009
Citation
Dhiman, R, & Chandra, S. "Effect of Substrate Temperature on Splashing of Molten Metal Droplets." Proceedings of the ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. Volume 1. Charlotte, North Carolina, USA. July 11–15, 2004. pp. 71-78. ASME. https://doi.org/10.1115/HT-FED2004-56096
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