Title

Radiative Energy and Momentum Transfer for Various Spherical Shapes: A Single Sphere, a Bubble, a Spherical Shell and a Coated Sphere

Authors

Yi Zheng, University of Rhode IslandFollow
Alok Ghanekar

Document Type

Article

Date of Original Version

2-12-2015

Abstract

We use fluctuational electrodynamics to determine spectral emissivity and van der Waals contribution to surface energy for various spherical shapes, such as a sphere, a bubble, a spherical shell, and a coated sphere, in a homogeneous and isotropic medium. The dyadic Green's function formalism of radiative energy and fluctuation-induced van der Waals stress for different spherical configurations has been developed. We show (1) emission spectra of micro- and nano-sized single and coated spheres display several emissivity sharp peaks as the size of object reduces and (2) surface energy becomes size dependent due to van der Waals phenomena when size of object is reduced to a nanoscopic length scale.

Citation/Publisher Attribution

Zheng, Y., & Ghanekar, A. (2015). Radiative energy and momentum transfer for various spherical shapes: a single sphere, a bubble, a spherical shell and a coated sphere. Journal of Applied Physics, 117: 064314. doi: 10.1063/1.4907913

Available at: http://dx.doi.org/10.1063/1.4907913