Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Residual sweeping effect in turbulent particle pair diffusion in a
  Lagrangian diffusion model   Thomson, D. J. \& Devenish, B. J. [{\em J.~Fluid Mech.} 526, 277 (2005)] and
others have suggested that sweeping effects make Lagrangian properties in
Kinematic Simulations (KS), Fung et al [Fung J. C. H., Hunt J. C. R., Malik N.
A. \& Perkins R. J. {\em J.~Fluid Mech.} 236, 281 (1992)], unreliable. Here it
is shown through a novel analysis based upon analysing pairs of particle
trajectories in a frame of reference moving with the large energy containing
scales of motion that the normalized integrated error $e^I_K$ in the turbulent
pair diffusivity ($K$) due to the sweeping effect decreases with increasing
pair separation ($\sigma_l$), such that $e^I_K\to 0$ as $\sigma_l/\eta\to
\infty$; and $e^I_K\to \infty$ as $\sigma_l/\eta\to 0$. $\eta$ is the
Kolmogorov turbulence microscale. There is an intermediate range of separations
$1<\sigma_l/\eta< \infty$ in which the error $e^I_K$ remains negligible.
Simulations using KS shows that in the swept frame of reference, this
intermediate range is large covering almost the entire inertial subrange
simulated, $1<\sigma_l/\eta< 10^5$, implying that the deviation from locality
observed in KS therefore cannot be atributed to sweeping errors and could be
real. This is important for pair diffusion theory and modeling.

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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: math
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ph