Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancing active wave absorption in RANS models   In this work we review the most common methods for absorbing waves in
Reynolds-Averaged Navier-Stokes (RANS) models. The limitations of active wave
absorption, originating from its initial assumption of linear wave theory in
shallow waters are overcome and the range of applicability is extended to any
relative water depth conditions by re-deriving the formulation. The new
Extended Range Active Wave Absorption (ER-AWA) overperforms the traditional
implementation in all the tests performed, which comprise solitary waves and
regular waves from shallow to deep waters. Moreover, the combined use of a
relaxation zone and ER-AWA is tested to further reduce wave reflections. This
is most often achieved for a given set of parameters, although some case by
case tuning of the relaxation zone parameters would be needed to obtain the
best overall performance.

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The categories of this paper are: q-fin
1
The categories of this paper are: cs
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
2
The categories of this paper are: math