Article

Ocean Dynamics

, Volume 60, Issue 6, pp 1479-1495

First online:

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

  • Stephen NashAffiliated withCivil Engineering, College of Engineering and Informatics, National University of Ireland, Galway Email author 
  • , Michael HartnettAffiliated withCivil Engineering, College of Engineering and Informatics, National University of Ireland, Galway

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

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