Many-body heat radiation and heat transfer in the presence of a nonabsorbing background medium
Name
PhysRevB.95.085413.pdf
Size
1.09 MB
Format
Adobe PDF
Checksum (MD5)
72e015b226bb0f217b63baa7554d1753
Author(s)
Müller, Boris
Incardone, Roberta
Antezza, Mauro
Emig, Thorsten
Krüger, Matthias
Date Issued
February 2017
Journal
Physical Review B
Publisher
American Physical Society
Citation
Müller, Boris et al. “Many-Body Heat Radiation and Heat Transfer in the Presence of a Nonabsorbing Background Medium.” Physical Review B 95.8 (2017): n. pag. © 2017 American Physical Society
Version
Final published version
Abstract
Heat radiation and near-field radiative heat transfer can be strongly manipulated by adjusting geometrical shapes, optical properties, or the relative positions of the objects involved. Typically, these objects are considered as embedded in vacuum. By applying the methods of fluctuational electrodynamics, we derive general closed-form expressions for heat radiation and heat transfer in a system of N arbitrary objects embedded in a passive nonabsorbing background medium. Taking into account the principle of reciprocity, we explicitly prove the symmetry and positivity of transfer in any such system. Regarding applications, we find that the heat radiation of a sphere as well as the heat transfer between two parallel plates is strongly enhanced by the presence of a background medium. Regarding near- and far-field transfer through a gas like air, we show that a microscopic model (based on gas particles) and a macroscopic model (using a dielectric contrast) yield identical results. We also compare the radiative transfer through a medium like air and the energy transfer found from kinetic gas theory.
MIT Department
MIT Energy Initiative
MultiScale Materials Science for Energy and Environment, Joint MIT-CNRS Laboratory
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.95.085413
