Experimental Investigation of Green Nanofluids: Assessment of Wettability, Viscosity and Thermal Conductivity

Nobrega, Glauco; Cardoso, Beatriz D.; Barbosa, Filipe; Pinho, Diana; Abreu, Cristiano; Souza, Reinaldo Rodrigues de; Moita, Ana S.; Ribeiro, J.E.; Lima, Rui A.

http://hdl.handle.net/10198/31179

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Autores

Souza, Reinaldo Rodrigues de

Moita, Ana S.

Ribeiro, J.E.

Lima, Rui A.

Resumo(s)

Metallic nanoparticles are a type of nanomaterial synthesized from metallic precursors. Due to their unique physiochemical, electrical, and optical properties, metallic nanoparticles are widely studied and applied in various areas such as medicine, electronics, and heat transfer systems. However, conventional synthesis methods to produce metallic nanoparticles face challenges such as instability and environmental concerns, prompting the exploration of greener synthesis methods. Green synthesis uses natural resources like plants and algae as reducing agents, offering a more environmentally friendly approach for the synthesis of metallic nanoparticles. These green-synthesized metallic nanoparticles can enhance heat transfer by becoming part of nanofluids (NFs), which are colloidal mixtures of NPs in a fluid base. NFs, employed for heat transfer. As a result, it is essential to characterize the NFs regarding wettability, viscosity, and thermal conductivity. The results of the spectrophotometer confirmed the green synthesis of NPs, and it was observed that the increase in NP concentration impacted the contact angle, improving the ability to wet. The thermal conductivity is also modified, with an improvement of 11.3% compared to distilled water, without a significant increase in fluid viscosity.

Palavras-chave

Green synthesis Metallic nanoparticles Nanofluids Heat transfer

URI

http://hdl.handle.net/10198/31179

Citação

Nobrega, Glauco; Cardoso, Beatriz; Barbosa, Filipe; Pinho, Diana; Abreu, Cristiano; Souza, Reinaldo; Moita, Ana; Ribeiro, João; Lima, Rui A. (2024). Experimental Investigation of Green Nanofluids: Assessment of Wettability, Viscosity and Thermal Conductivity. In ASME 2024 7th International Conference on Micro/Nanoscale Heat and Mass Transfer (MNHMT 2024). American Society of Mechanical Engineers, p. 1-5. ISBN 978-0-7918-8815-5.