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Cien veces mayor transferencia de calor radiativo sobre el límite del cuerpo negro
Dakotah Thompson1, Linxiao Zhu1, Rohith Mittapally1
1Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, USA.
Nature
|March 7, 2019
Resumen
Este estudio corrige las afirmaciones anteriores sobre la transferencia de calor radiativo. Los hallazgos muestran que el límite del cuerpo negro se puede superar en el campo lejano, especialmente para las estructuras dieléctricas.
Área de la Ciencia:
- La física
- La termodinámica
- Nanotecnología
Sus antecedentes:
- Investigaciones anteriores sugirieron limitaciones en las mejoras de transferencia de calor radiativo para esferas/cilindros metálicos y dieléctricos.
- En una carta específica se indicaba que no se esperaban mejoras significativas para las esferas metálicas y solo aumentos menores para las esferas dieléctricas o los cilindros metálicos.
Objetivo del estudio:
- Para corregir una declaración errónea en una carta publicada anteriormente con respecto a la transferencia de calor radiativo.
- Para resaltar los hallazgos computacionales y experimentales que demuestran que el límite del cuerpo negro se puede superar en el campo lejano.
Principales métodos:
- Se realizó un análisis computacional detallado.
- Se llevó a cabo un análisis experimental.
- Se reevaluó el estudio computacional de referencia 13 sobre la transferencia de calor radiativo entre membranas dieléctricas rectangulares.
Principales resultados:
- El trabajo en la referencia 13 apoya los hallazgos de que el límite del cuerpo negro se puede superar en el campo lejano.
- El estudio computacional en la referencia 13 es consistente con el análisis experimental y computacional de los autores.
- Las mejoras en la transferencia de calor radiativo más allá del límite del cuerpo negro son posibles, particularmente con estructuras dieléctricas.
Conclusiones:
- El límite del cuerpo negro para la transferencia de calor radiativo puede ser superado en el campo lejano.
- Las estructuras dieléctricas, como las membranas rectangulares, son prometedoras para superar el límite del cuerpo negro.
- Se justifica una mayor investigación sobre la transferencia de calor radiativo de campo lejano, especialmente para los materiales dieléctricos.
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