Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Near-field radiative heat transfer between irregularly shaped dielectric
  particles modeled with the discrete system Green's function method   Near-field radiative heat transfer (NFRHT) between irregularly shaped
dielectric particles made of SiO2 and morphology characterized by Gaussian
random spheres is studied. Particles are modeled with a new numerical method
based on fluctuational electrodynamics, called the discrete system Green's
function (DSGF) approach, that defines system interactions deterministically
via a self-consistent Green's function equation and is applicable to finite,
three-dimensional objects. The DSGF method is deemed suitable to model NFRHT
between irregularly shaped particles after verification against the analytical
solution for chains of two and three SiO2 spheres. The NFRHT results reveal
that geometric irregularity in particles leads to a reduction of the total
conductance from that of comparable perfect spheres at small separation
distances where NFRHT is a surface phenomenon. At larger separation distances
where NFRHT becomes a volumetric process, the total conductance between
irregularly shaped particles converges to that of comparable perfect spheres.
Spectral analysis reveals, however, that particle irregularity leads to damping
and broadening of resonances at all separation distances, thereby highlighting
the importance of the DSGF method for spectral engineering in the near field.
The reduced spectral coherence when particle size is larger than the vacuum
separation distance is attributed to coupling of surface phonon-polaritons
within the randomly generated, distorted particle features. For particle size
smaller than the vacuum separation distance, resonance broadening and damping
is linked with the multiple localized surface phonon modes supported by the
composite spherical harmonic morphologies of the Gaussian random spheres.

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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
27
The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th