Development of a finite element marine model

摘要: Numerical models are very helpful to understand the behaviour of marine system. Ocean have been developed for more than forty years, and their design is an area active research. If representation physics has highly improved, fundamental numerical technique not evolved: they still use finite difference method on structured grids. Recent efforts focus developing new generation ocean models, taking advantage potential modern methods. Based unstructured grids, such allow faithfully represent complex topographic features as coastlines, narrow straits islands. The mesh resolution can be refined locally in regions interest or where dynamics demanding. This PhD dissertation focuses development a three-dimensional baroclinic model using Discontinuous Galerkin element method. described, with some results simulations. rest thesis devoted different types unresolved physics. Two boundary layers introduced: bottom velocity layer residence time. Both parameterisation extended discussed. A chapter dedicated treatment horizontal density gradient column models. Attention paid stability under configurations. Then, turbulence modelling studied by comparing effect closure simulation flow around shallow-water island.