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The radiation exchange between two objects is enhanced over the black body limit when the separation between them is less than the wavelength of the dominant frequency. This application calculates the near-field radiation exchange as well as the far-field exchange in p- and s- polarization.
Python: numpy, scipy, sympy, numexpr, matplotlib; rappture
Vanderbilt University Department of Mechanical Engineering
http://www.thermalfluidscentral.org/encyclopedia/index.php/Near-field_radiative_transfer_between_two_semi-infinite_media Results from the application have been checked against data shown in:  Basu, S., Zhang, Z. M. and Fu, C. J. (2009), Review of near-field thermal radiation and its application to energy conversion. Int. J. Energy Res., 33: 1203–1232. doi: 10.1002/er.1607  Francoeur, M. (2010). Near-field radiative transfer: thermal radiation, thermophotovoltaic power generation and optical characterization. Ph.D. Thesis. University of Kentucky: U.S.A.  Mulet, J. P., Joulain, K., Carminati, R., & Greffet, J. J. (2002). Enhanced radiative heat transfer at nanometric distances. Microscale Thermophysical Engineering, 6(3), 209-222.
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