Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A compact heat transfer model based on an enhanced Fourier law for
  analysis of frequency-domain thermoreflectance experiments   A recently developed enhanced Fourier law is applied to the problem of
extracting thermal properties of materials from frequency-domain
thermoreflectance (FDTR) experiments. The heat transfer model comprises
contributions from two phonon channels; one a high-heat-capacity diffuse
channel consisting of phonons of mean free path (MFP) less than a threshold
value, and the other a low-heat-capacity channel consisting of phonons with MFP
higher than this value that travel quasi-ballistically over length scales of
interest. The diffuse channel is treated using the Fourier law, while the
quasi-ballistic channel is analyzed using a second-order spherical harmonic
expansion of the phonon distribution function. A recent analysis of FDTR
experimental data suggested the use of FDTR in deriving large portions of the
MFP accumulation function; however, it is shown here that the data can
adequately be explained using our minimum-parameter model, thus highlighting an
important limitation of FDTR experiments in exploring the accumulation function
of bulk matter.

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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: math-ph