An innovative PDMS cell to improve the thermal conductivity measurements of nanofluids

Autor(es)

Souza, R. R. ; Barbosa, F. M. Sa ; Nobrega, G. ; Cardoso, E. M. ; Teixeira, J. C. F. ; Moita, A. S. ; Lima, R.

• Tipo de documento: Artigo Científico
• Fonte: THERMAL SCIENCE AND ENGINEERING PROGRESS; v. 42, p. 8-pg., 2023-05-29.

Resumo

The traditional methods to measure the thermal conductivity of nanofluids (NFs) do not allow the investigation of critical features that affect the NF's heat transfer performance. For instance, during the thermal conductivity measurements, the NF's thermal properties may be subject to several critical features such as sedimentation, aggregation and wall adhesion of NPs. In addition, the measurement cell has severe functional limitations in terms of full cleaning and performing direct visualizations due mainly to design, geometrical and material constraints. These are frequent problems encountered at the transient hot-wire and transient plane source (TPS) methods, two popular techniques often used to measure NF's thermal conductivity. In this way, polydimethylsiloxane (PDMS), due to its unique properties, such as thermal stability and excellent optical transparency, was applied to fabricate an innovative and simple cell that offers a more straightforward and efficient way to clean the NPs deposited on the walls and as a result to avoid any possible sample contaminations. (AU)

• Processo FAPESP: 13/15431-7 - Análise da aplicação de nanotecnologia em processos térmicos e de conversão de energia
• Beneficiário: Elaine Maria Cardoso
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 22/03946-1 - Comportamento térmico e fluidodinâmico de escoamento em dissipadores microaletados de nanocompósito de PDMS
• Beneficiário: Elaine Maria Cardoso
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 19/02566-8 - Caracterização experimental do desempenho térmico e hidrodinâmico de dissipadores de calor microaletados durante a ebulição convectiva
• Beneficiário: Elaine Maria Cardoso
• Modalidade de apoio: Auxílio à Pesquisa - Regular