Modeling and analysis of surface roughness of microchannels produced by μ-WEDM using an ANN and Taguchi method

Rahim Jafari, Müge Kahya, Samad Nadimi Bavil Oliaei*, Hakkı Özgür Ünver, Tuba Okutucu Özyurt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Microchannel heat exchangers are used to remove the high heat fluxes generated in compact electronic devices. The roughness of the microchannels has a significant effect on the heat transfer characteristics, especially the nucleate boiling and pumping power. Therefore, development of predictive models of surface texture is of significant importance in controlling heat transfer characteristics of these devices. In this study, micro-Wire electrical discharge machining (μ-WEDM) was employed to fabricate metal-based microchannel heat sinks with different surface textures. First, experiments were conducted to achieve the desired surface roughness values. Oxygen-free copper is a common material in the cooling systems of electronic devices because of its high thermal conductivity and low cost. Design of experiment approach based on the Taguchi technique was used to find the optimum set of process parameters. An analysis of variance is also performed to determine the significance of process parameters on the surface texture. An artificial neural network model is utilized to assess the variation of the surface roughness with process parameters. The predictions are in very good agreement with results yielding a coefficient of determination of 99.5 %. The results enable to determine μ-WEDM parameters which can result in the desired surface roughness, to have a well-controlled flow and heat transfer characteristics for the microchannels.

Original languageEnglish
Pages (from-to)5447-5457
Number of pages11
JournalJournal of Mechanical Science and Technology
Volume31
Issue number11
DOIs
Publication statusPublished - 1 Nov 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017, The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature.

Funding

The authors would like to thank Dr. Yigit Karpat at the Micro System Design and Manufacturing Center at Bilkent University. This project was supported by the Scientific and Technological Research Council of Turkey (TÜBİTAK) under grant number 112M168.

FundersFunder number
TÜBİTAK112M168
Horizon 2020 Framework Programme856619
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

    Keywords

    • Microchannel
    • Surface roughness
    • Taguchi method
    • Wire electrical discharge machining

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