Journal ArticleDOI
A fully implicit wetting-drying method for DG-FEM shallow water models, with an application to the Scheldt Estuary
Tuomas Kärnä,Benjamin de Brye,Olivier Gourgue,Jonathan Lambrechts,Richard Comblen,Vincent Legat,Eric Deleersnijder +6 more
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TLDR
A novel wetting–drying method in which the position of the sea bed is allowed to fluctuate in drying areas, which is compatible with fully implicit time-marching schemes, thus reducing the overall computational cost significantly.About:
This article is published in Computer Methods in Applied Mechanics and Engineering.The article was published on 2011-01-15. It has received 112 citations till now. The article focuses on the topics: Water flow & Discontinuous Galerkin method.read more
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A finite-element, multi-scale model of the Scheldt tributaries, river, estuary and ROFI
Benjamin de Brye,Anouk de Brauwere,Anouk de Brauwere,Olivier Gourgue,Tuomas Kärnä,Jonathan Lambrechts,Richard Comblen,Eric Deleersnijder +7 more
TL;DR: In this article, a coupled two-and one-dimensional finite-element model for the Scheldt tributaries, River, Estuary and region of fresh water influence (ROFI) is presented.
Journal ArticleDOI
Thetis coastal ocean model: discontinuous Galerkin discretization for the three-dimensional hydrostatic equations
Tuomas Kärnä,Tuomas Kärnä,Stephan C. Kramer,Lawrence Mitchell,Lawrence Mitchell,David A. Ham,Matthew D. Piggott,António M. Baptista +7 more
TL;DR: A novel discontinuous Galerkin (DG) finite element discretization for the hydrostatic equations that is fully conservative and second-order accurate in space and time and capable of simulating baroclinic flows in the eddying regime.
Journal ArticleDOI
Optimising tidal range power plant operation
TL;DR: In this article, the authors proposed a framework where simplified power plant operation models are coupled with gradient-based optimisation techniques to determine the optimal control strategy over multiple tidal cycles, and the optimisation results inform coastal ocean simulations that include tidal power plants to gauge whether the benefits of an adaptive operation are preserved once their hydrodynamic impacts are also taken into consideration.
Journal ArticleDOI
Water renewal timescales in the Scheldt Estuary
TL;DR: In this article, the authors used the concepts of the Constituent-oriented Age and Residence time Theory (CART) to compute timescales related to the water renewal in the Scheldt Estuary (The Netherlands/Belgium).
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A framework for automated PDE-constrained optimisation
TL;DR: A generic framework for the solution of PDE-constrained optimisation problems based on the FEniCS system is presented, with an intuitive mathematical interface, a high degree of automation, and an efficient implementation of the generated adjoint model.
References
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The NCEP/NCAR 40-Year Reanalysis Project
Eugenia Kalnay,Masao Kanamitsu,Robert Kistler,William D. Collins,D.G. Deaven,L. S. Gandin,M. Iredell,Suranjana Saha,Glenn H. White,John S. Woollen,Yuejian Zhu,Muthuvel Chelliah,Wesley Ebisuzaki,Wayne Higgins,John E. Janowiak,Kingtse C. Mo,Chester F. Ropelewski,Julian X. L. Wang,Ants Leetmaa,Richard W. Reynolds,Roy L. Jenne,Dennis Joseph +21 more
TL;DR: The NCEP/NCAR 40-yr reanalysis uses a frozen state-of-the-art global data assimilation system and a database as complete as possible, except that the horizontal resolution is T62 (about 210 km) as discussed by the authors.
Journal ArticleDOI
GMRES: a generalized minimal residual algorithm for solving nonsymmetric linear systems
Youcef Saad,Martin H. Schultz +1 more
TL;DR: An iterative method for solving linear systems, which has the property of minimizing at every step the norm of the residual vector over a Krylov subspace.
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Approximate Riemann Solvers, Parameter Vectors, and Difference Schemes
TL;DR: In this article, it is shown that these features can be obtained by constructing a matrix with a certain property U, i.e., property U is a property of the solution of the Riemann problem.
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Gmsh: A 3-D finite element mesh generator with built-in pre- and post-processing facilities
TL;DR: Gmsh as mentioned in this paper is an open-source 3D finite element grid generator with a build-in CAD engine and post-processor that provides a fast, light and user-friendly meshing tool with parametric input and advanced visualization capabilities.