Transition from the incoherent to the coherent regime for propagative wave-based thermal radiation

Y. Tsurimaki (1, 2) , Pierre-Olivier Chapuis (2) , J. Okajima (1) , A. Komiya (1) , S. Maruyama (1) , Rodolphe Vaillon (2)

1 IFS - Institute of Fluid Sciences [Sendai]
2 CETHIL - Centre d'Energétique et de Thermique de Lyon

The transition from the incoherent to the coherent regime for thermal radiation between bodies trough a transparent medium is discussed. The canonical case of two parallel semi-infinite planar media is used as a basis to provide an insight into the physics and quantities ruling the distance at which coherent effects have an impact on the propagative component of the net heat flux exchanged. A practical criterion is proposed to define the distance below which radiation intensity framework should not be used, but instead fluctuational electrodynamics.

Domaines: Thermique [physics.class-ph]

Y. Tsurimaki, Pierre-Olivier Chapuis, J. Okajima, A. Komiya, S. Maruyama, et al.. Transition from the incoherent to the coherent regime for propagative wave-based thermal radiation. Journal of Physics: Conference Series, 2016, 676 (1), pp.012023. ⟨hal-01285194⟩