Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Robustness of heat-transfer in confined inclined convection at
  high-Prandtl-number   We investigate the dependency of the magnitude of heat transfer in a
convection cell as a function of its inclination by means of experiments and
simulations. The study is performed with a working fluid of large Prandtl
number, $Pr \simeq 480$, and at Rayleigh numbers $Ra \simeq 10^{8}$ and $Ra
\simeq 5 \times 10^{8}$ in a quasi-two-dimensional rectangular cell with unit
aspect ratio. By changing the inclination angle ($\beta$) of the convection
cell, the character of the flow can be changed from moderately turbulent, for
$\beta = 0^o$, to laminar and steady at $\beta = 90^o$. The global heat
transfer is found to be insensitive to the drastic reduction of turbulent
intensity, with maximal relative variations of the order of $20\%$ at $Ra
\simeq 10^{8}$ and $10\%$ at $Ra \simeq 5 \times 10^{8}$, while the Reynolds
number, based on the global root-mean- square velocity, is strongly affected
with a decay of more than $85\%$ occurring in the laminar regime. We show that
the intensity of the heat flux in the turbulent regime can be only weakly
enhanced by establishing a large scale circulation flow by means of small
inclinations. On the other hand, in the laminar regime the heat is transported
solely by a slow large scale circulation flow which exhibits large correlations
between the velocity and temperature fields. For inclination angles close to
the transition regime in-between the turbulent-like and laminar state, a
quasi-periodic heat-flow bursting phenomenon is observed.

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The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph