Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Second-order discontinuous Galerkin flood model: comparison with
  industry-standard finite volume models   Finite volume (FV) numerical solvers of the two-dimensional shallow water
equations are core to industry-standard flood models. The second-order
Discontinuous Galerkin (DG2) alternative, although a viable way forward to
improve current FV-based flood models, is yet under-studied and rarely used to
support flood modelling applications. This paper systematically explores and
compares the predictive properties of a robust DG2 flood model to those of
prominent FV-based industrial flood models. To identify the simplest and most
efficient DG2 configuration suitable for flood inundation modelling, two
variants - with and without local slope limiting - are considered. The
numerical conservation properties of the DG2 variants are compared to those of
a first-order FV (FV1) and a second-order FV (FV2) counterparts. The DG2
variants are then tested over five realistic flooding scenarios, recommended by
the UK Environment Agency to validate 2D flood model capabilities, while
comparing their performance against that of four FV-based commercial models
(i.e. TUFLOW-FV1, TUFLOW-FV2, TUFLOW-HPC and Infoworks ICM). Results reveal
that the DG2 variant without local limiting (DG2-NL) is capable to simulate
shockless flood flows featured in a wide range of flood modelling applications.
The DG2-NL shows closer predictions to commercial model outputs at
twice-coarser spatial resolution, and can run twice faster to produce more
informative hydrograph with small-scale transients over long-range simulations,
even when the sampling is far away from the flooding source.

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The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
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The categories of this paper are: eess
2
The categories of this paper are: math
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio