Author(s)

R.W. Barber & L.J. Scott

Abstract

Numerical modelling of tidal propagation in the Severn Estuary using a depth-adapted non-orthogonal grid R.W. Barber* & L.J. Scotf ^Computational Engineering Group, Daresbury Laboratory, U.K. * Advantage CFD, Reynard Motorsport Ltd., U.K. Abstract With greater use being made of computational hydrodynamic and pollution transport models for water quality assessments of coastal and estuarine areas, increasing emphasis needs to be focused on providing an accurate treatment of the complex boundary configurations which are typical of coastal regions. This paper presents details of a depth-averaged two-dimensional numerical model which makes use of a curvilinear or boundary-fitted non-orthogonal coordinate system. The curvilinear approach provides an accurate representation of the complex shape of natural flow domains and avoids the approximate 'staircase' representation associated with models based upon regular Cartesian finite-difference grids. Special attention is given to the

Keywords