Numerical Simulations of a Dispersive Model Approximating Free-Surface Euler Equations

Journal article

In some configurations, dispersion effects must be taken into account to improve the simulation of complex fluid flows. A family of free-surface dispersive models has been derived in Fernández-Nieto et al. (Commun Math Sci 16(05):1169–1202, 2018). The hierarchy of models is based on a Galerkin approach and parameterised by the number of discrete layers along the vertical axis. In this paper we propose some numerical schemes designed for these models in a 1D open channel. The cornerstone of this family of models is the Serre – GreenNaghdi model which has been extensively studied in the literature from both theoretical and numerical points of view. More precisely, the goal is to propose a numerical method for the LDNH2 model that is based on a projection method extended from the one-layer case to any number of layers. To do so, the one-layer case is addressed by means of a projectioncorrection method applied to a non-standard differential operator. A special attention is paid to boundary conditions. This case is extended to several layers thanks to an original relabelling of the unknowns. In the numerical tests we show the convergence of the method and its accuracy compared to the LDNH0 model

Authors: Sánchez, CE; Fernández-Nieto, ED; de Luna, TM; Penel, Y; Sainte-Marie, J

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of Scientific Computing
• Volume: 89
• Issue: 3
• Pages: 55
• Article number: 55
• Publication date: 2021-10-18
• DOI: 10.1007/s10915-021-01552-6
• EISSN: 1573-7691
• ISSN: 0885-7474
• Language: English
• Keywords: Physics; Algorithm; Surface (topology); Numerical analysis; Applied mathematics; Dispersion (optics); Mathematics; Geometry; Convergence (economics); Projection (relational algebra); Mathematical analysis; Computer science