Flexible and efficient discretizations of multilayer models with variable density
Autor
Garres-Díaz, José
Bonaventura, Luca
Editor
ElsevierFecha
2021Materia
Semi-implicit methodMultilayer approach
Depth-averaged model
Mass exchange
Stratified flow
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We show that the semi-implicit time discretization approaches previously introduced for multilayer shallow water models for the barotropic case can be also applied to the variable density case with Boussinesq approximation. Furthermore, also for the variable density equations, a variable number of layers can be used, so as to achieve greater flexibility and efficiency of the resulting multilayer approach. An analysis of the linearized system, which allows to derive linear stability parameters in simple configurations, and the resulting spatially semi-discretized equations are presented. A number of numerical experiments demonstrate the effectiveness of the proposed approach.