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Shoreline and bathymetry approximation in mesh generation for tidal renewable simulations

Shoreline and bathymetry approximation in mesh generation for tidal renewable simulations
Shoreline and bathymetry approximation in mesh generation for tidal renewable simulations
Due to the fractal nature of the domain geometry in geophysical flow simulations, a completely accurate description of the domain in terms of a computational mesh is frequently deemed infeasible. Shoreline and bathymetry simplification methods are used to remove small scale details in the geometry, particularly in areas away from the region of interest. To that end, a novel method for shoreline and bathymetry simplification is presented. Existing shoreline simplification methods typically remove points if the resultant geometry satisfies particular geometric criteria. Bathymetry is usually simplified using traditional filtering techniques, that remove unwanted Fourier modes. Principal Component Analysis (PCA) has been used in other fields to isolate small-scale structures from larger scale coherent features in a robust way, underpinned by a rigorous but simple mathematical framework. Here we present a method based on principal component analysis aimed towards simplification of shorelines and bathymetry. We present the algorithm in detail and show simplified shorelines and bathymetry in the wider region around the North Sea. Finally, the methods are used in the context of unstructured mesh generation aimed at tidal resource assessment simulations in the coastal regions around the UK.
Avdis, A.
327b80cd-a442-4f69-9bd2-2b56c01b9e68
Jacobs, C.T.
a4bfe34f-66d4-4e79-a2a1-8b117f4c5799
Hill, J.
fa0510a6-d43e-42eb-a3d0-e63173004fd8
Piggott, M.D.
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Gorman, G.J.
418cf254-7964-4a73-a1ef-d441fba59fca
Avdis, A.
327b80cd-a442-4f69-9bd2-2b56c01b9e68
Jacobs, C.T.
a4bfe34f-66d4-4e79-a2a1-8b117f4c5799
Hill, J.
fa0510a6-d43e-42eb-a3d0-e63173004fd8
Piggott, M.D.
9f9fbf82-8bbb-4461-99bd-0053f5a22fff
Gorman, G.J.
418cf254-7964-4a73-a1ef-d441fba59fca

Avdis, A., Jacobs, C.T., Hill, J., Piggott, M.D. and Gorman, G.J. (2015) Shoreline and bathymetry approximation in mesh generation for tidal renewable simulations. Proceedings of 11th European Wave & Tidal Energy Conference (EWTEC 2015), France. 06 - 11 Sep 2015. 7 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Due to the fractal nature of the domain geometry in geophysical flow simulations, a completely accurate description of the domain in terms of a computational mesh is frequently deemed infeasible. Shoreline and bathymetry simplification methods are used to remove small scale details in the geometry, particularly in areas away from the region of interest. To that end, a novel method for shoreline and bathymetry simplification is presented. Existing shoreline simplification methods typically remove points if the resultant geometry satisfies particular geometric criteria. Bathymetry is usually simplified using traditional filtering techniques, that remove unwanted Fourier modes. Principal Component Analysis (PCA) has been used in other fields to isolate small-scale structures from larger scale coherent features in a robust way, underpinned by a rigorous but simple mathematical framework. Here we present a method based on principal component analysis aimed towards simplification of shorelines and bathymetry. We present the algorithm in detail and show simplified shorelines and bathymetry in the wider region around the North Sea. Finally, the methods are used in the context of unstructured mesh generation aimed at tidal resource assessment simulations in the coastal regions around the UK.

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More information

e-pub ahead of print date: 8 September 2015
Venue - Dates: Proceedings of 11th European Wave & Tidal Energy Conference (EWTEC 2015), France, 2015-09-06 - 2015-09-11
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 394713
URI: https://eprints.soton.ac.uk/id/eprint/394713
PURE UUID: 38d6bd31-3fc4-45b2-abb6-1b0552c9af63

Catalogue record

Date deposited: 18 May 2016 13:31
Last modified: 17 Jul 2017 18:58

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