Ocean Dynamics

, Volume 60, Issue 6, pp 1479–1495

Nested circulation modelling of inter-tidal zones: details of a nesting approach incorporating moving boundaries

Article

Abstract

Nested circulation models developed to date either exclude the flooding and drying process or prohibit flooding and drying of nested boundaries; they are therefore ill-suited to the accurate modelling of inter-tidal areas. The authors have developed a nested model with moving boundaries which permits flooding and drying of both the interior domain and the nested boundaries. The model uses a novel approach to boundary formulation; ghost cells are incorporated adjacent to the nested boundary cells so that the nested boundaries operate as internal boundaries. When combined with a tailored adaptive interpolation technique, the approach facilitates a dynamic internal boundary. Details of model development are presented with particular emphasis on the treatment of the nested boundary. Results are presented for Cork Harbour, a natural coastal system with an extensive inter-tidal zone and a complex flow regime which provided a rigorous test of model performance. The nested model was found to achieve the accuracy of a high resolution single grid model for a much lower computational cost.

Keywords

Nesting Circulation model Ghost cells Internal boundary Flooding and drying Moving boundary 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Civil Engineering, College of Engineering and InformaticsNational University of Ireland, GalwayGalwayIreland

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