Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of Horizontal Spacing and Tilt Angle on Thermo-Buoyant Natural
  Convection from Two Horizontally Aligned Square Cylinders   Laminar natural convection heat transfer from two horizontally aligned square
cylinders has been investigated numerically using a finite-volume method (FVM)
approach. Computations were performed to delineate the momentum and heat
transfer characteristics under the following ranges of parameters: horizontal
spacing between the cylinders (0 <= S/W <= 10), tilt angle of the square
cylinder (0^0 <= {\delta} <= 60^0), and Grashof number (10 <= Gr <= 10^5) for
some specific Newtonian fluids having Prandtl number (0.71 <= Pr <= 7). The
comprehensive results are represented in terms of temperature contours and
streamlines, velocity and temperature profiles, the mass flow rate in the
passage between the cylinders, local and average Nu, and the drag coefficient.
Owing to the development of a chimney effect, the heat transfer increases with
decrease in the horizontal spacing up to a certain limit, whereas it
significantly degrades with a further decrease in the spacing. The square
cylinder having {\delta} = 45^0 shows a higher heat transfer, whereas it is
least for {\delta} = 0^0. At higher Gr and Pr, the average Nu is found to be in
excess of 22% at {\delta} = 45^0 compared to at {\delta} = 0^0. Overall, the
average Nu has a strong dependence on both Gr and Pr, whereas it is a weak
function of S/W and {\delta}. Furthermore, the entropy generation is reproduced
non-dimensionally in terms of the Bejan number. Finally, a correlation for the
average Nu has been developed, which can be useful for the engineering
calculations.

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The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
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The categories of this paper are: nlin
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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: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: econ
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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: cmp-lg