Experimental and numerical investigation of flat plate fins and inline strip fins heat sinks

William Denner Pires-Fonseca; Carlos Alberto Carrasco-Altemani

doi:10.17533/udea.redin.20230417

Autores/as

William Denner Pires-Fonseca Universidade Estadual de Campiana https://orcid.org/0000-0001-5184-2193
Carlos Alberto Carrasco-Altemani Universidade Estadual de Campianas

DOI:

https://doi.org/10.17533/udea.redin.20230417

Palabras clave:

investigación experimental, disipadores de calor, enfriamiento de equipos electrónicos

Resumen

Las características de flujo y transferencia de calor de dos disipadores de calor análogos se obtuvieron a partir de experimentos de laboratorio y se compararon entre sí y con simulaciones numéricas. Uno contenía aletas rectas continuas y el otro, aletas de tira en línea, ambas enfriadas por un flujo de aire forzado paralelo a su base. La velocidad promedio del flujo de aire en los canales entre aletas osciló entre 4 y 20 m/s, lo que corresponde a números de Reynolds de 810 a 3800. Las mediciones indicaron que a pesar de su menor área de intercambio de calor, el coeficiente de convección del disipador de calor de las aletas de tira era lo suficientemente grande como para obtener una resistencia térmica menor que la de las aletas continuas. Se realizaron simulaciones numéricas para comparar sus resultados con los experimentos. Se utilizaron dos tratamientos distintos para las aletas: uno consideró aletas sin espesor, isotérmicas con la temperatura base de las aletas. El otro consideró el grosor de las aletas y un perfecto contacto térmico con la base del disipador de calor. Los resultados de la simulación del número de Nusselt para las aletas continuas coincidieron en un 3% con las medidas, pero se observaron desviaciones mayores para el disipador de calor de las aletas en tira.

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Biografía del autor/a

William Denner Pires-Fonseca, Universidade Estadual de Campiana

Investigador, Departamento de Energía

Carlos Alberto Carrasco-Altemani, Universidade Estadual de Campianas

Profesor titular de Ingeniería Mecánica, Universidad de Campinas, Departamento de Energía

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