Proximity effects in radiative heat transfer

Karthik Sasihithlu, Arvind Narayanaswamy
2011 Physical Review B  
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, based on the analysis of the surface polariton mediated radiative transfer between two spheres of equal radii R and minimum gap d, that the near--field radiative transfer scales as R/d as d/R → 0 and as (R/d) for larger values of d/R up to the far--field limit. We propose a modified form of the proximity approximation to predict
more » ... ear--field radiative transfer between curved objects from simulations of radiative transfer between planar surfaces.
doi:10.1103/physrevb.83.161406 fatcat:xfvrpuwwfnfkrceze2bxks5kqi