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Proximity Effects in Radiative Heat Transfer

Narayanaswamy, Arvind; Sasihithlu, Karthik

Though the dependence of near-field radiative transfer on the gap between two planar objects is well understood, that between curved objects is still unclear. We show unequivocally that the surface polariton mediated radiative transfer between two spheres of equal radii R and minimum gap d scales as R/d as the nondimensional gap d/R→0. We discuss the proximity approximation form that is being used at present to compare with experimental observations and suggest a modified form in order to satisfy the continuity requirement between far-field and near-field radiative transfer between the spheres.

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Also Published In

Title
Physical Review B
DOI
https://doi.org/10.1103/PhysRevB.83.161406

More About This Work

Academic Units
Mechanical Engineering
Published Here
April 3, 2013
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