Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Towards adaptive simulations of turbulent wings at high Reynolds numbers   Adaptive mesh refinement (AMR) in the high-order spectral-element method code
Nek5000 is demonstrated and validated with well-resolved large-eddy simulations
(LES) of the flow past a wing profile. In the present work, the flow around a
NACA 4412 profile at a chord-based Reynolds number $Re_c=200,000$ is studied at
two different angles of attack: 5 and 11 degrees. The mesh is evolved from a
very coarse initial mesh by means of volume-weighted spectral error indicators,
until a sufficient level of resolution is achieved at the boundary and wake
regions. The non-conformal implementation of AMR allows the use of a large
domain avoiding the need of a precursor RANS simulation to obtain the boundary
conditions (BCs). This eliminates the effect of the steady Dirichlet BCs on the
flow, which becomes a relevant source of error at higher angles of attack
(specially near the trailing edge and wake regions). Furthermore,
over-refinement in the far field and the associated high-aspect ratio elements
are avoided, meaning less pressure-iterations of the solver and a reduced
number of elements, which leads to a considerable computational cost reduction.
Mean flow statistics are validated using experimental data obtained for the
same profile in the Minimum Turbulence Level (MTL) wind tunnel at KTH, as well
as with a previous DNS simulation, showing excellent agreement. This work
constitutes an important step in the direction of studying stronger pressure
gradients and higher Reynolds complex flows with the high fidelity that
high-order simulations allow to achieve. Eventually, this database can be used
for the development and improvement of turbulence models, in particular wall
models.

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The categories of this paper are: stat
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The categories of this paper are: astro-ph
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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: math-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: cs