Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/88713
Title: Fabrication of minichannel fractal flow channels by selective laser melting for two-phase flow cooling applications
Authors: Leong, Kai Choong
See, Yao Song
Keywords: Flow Boiling
Fractal
DRNTU::Engineering::Mechanical engineering::Prototyping
Issue Date: 2018
Source: See, Y. S., & Leong, K. C. (2018). Fabrication of minichannel fractal flow channels by selective laser melting for two-phase flow cooling applications. Proceedings of the 3rd International Conference on Progress in Additive Manufacturing (Pro-AM 2018), 667-672. doi:10.25341/D4JP45
Abstract: Fractal design flow channels provide better flow stability and heat dissipation capacity than conventional parallel channel flow channels under flow boiling conditions although they are difficult to fabricate. The Selective Laser Melting (SLM) technique is selected to explore the feasibility of fabricating minichannel fractal flow channels with four various branch levels, denoted as c = 1, 2, 3, 4, using AlSi10Mg, an aluminium alloy metallic powder. The largest inaccuracy of the flow channel diameters was found to be 1.6%. The flow boiling heat transfer performance was also investigated at a mass flux of 900 kg/m²∙s and was found that c = 2 has the highest heat transfer coefficient, being 3.5%, 0.9% and 5.8% higher than c = 1, c = 3 and c = 4. Preliminary studies shown that the higher flow channel designs experienced dryout at lower heat supplied, which hinders heat transfer performance. This trend may show that higher branch levels may not necessarily lead to better thermal performance.
URI: https://hdl.handle.net/10356/88713
http://hdl.handle.net/10220/45876
DOI: https://doi.org/10.25341/D4JP45
Rights: © 2018 Nanyang Technological University. Published by Nanyang Technological University, Singapore.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:Pro-AM Conference Papers

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