Volume 45, Issue 5 pp. 808-816
Research Article

Pool Boiling Heat Transfer on a Micro-Structured Copper Oxide Surface with Varying Wettability

Pulak Sen

Pulak Sen

National Institute of Technology Agartala, Department of Mechanical Engineering, Jirania, 799046 Tripura, India

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Sanjib Kalita

Sanjib Kalita

National Institute of Technology Arunachal Pradesh, Department of Mechanical Engineering, Jote, 791113 Arunachal Pradesh, India

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Dipak Sen

Corresponding Author

Dipak Sen

National Institute of Technology Arunachal Pradesh, Department of Mechanical Engineering, Jote, 791113 Arunachal Pradesh, India

Correspondence: Dipak Sen ([email protected]), National Institute of Technology Arunachal Pradesh, Department of Mechanical Engineering, Jote, Arunachal Pradesh, 791113, India.Search for more papers by this author
Sudev Das

Sudev Das

National Institute of Technology Calicut, Department of Chemical Engineering, Kozhikode, 673601 Kerala, India

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Ajoy Kumar Das

Ajoy Kumar Das

National Institute of Technology Agartala, Department of Mechanical Engineering, Jirania, 799046 Tripura, India

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First published: 17 February 2022
Citations: 4

Abstract

Copper surface is modified to copper oxide surface for high heat flux electronics applications. Copper oxide surface is prepared by chemical etching using NaOH and (NH4)2S2O8. A pool boiling experiment is conducted to investigate the critical heat flux (CHF) and boiling heat transfer coefficient (BHTC). The results indicate that BHTC of all copper oxide surfaces are enhanced remarkably. Bubble dynamics are also analyzed by means of a high-speed camera. Bubble visualization demonstrates that the active nucleation sites for the copper oxide surfaces are higher than the bare copper surface.

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