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- W3157331512 abstract "In this chapter, we apply the framework of the Virtual Element Method (VEM) to a model in Magneto-HydroDynamics (MHD), that incorporates a coupling between electromagnetics and fluid flow, to construct novel discretizations for simulating realistic phenomenon in MHD. First, we study two chains of spaces approximating the electromagnetic and fluid flow components of the model. Then, we show that this VEM approximation will yield divergence free discrete magnetic and velocity fields that are important properties in any simulation in MHD. We present a linearization strategy to solve the VEM approximation which respects the divergence free condition on the magnetic field. This linearization will require that, at each non-linear iteration, a linear system be solved. We study these linear systems and show that they represent well-posed saddle point problems. We conclude by presenting numerical experiments exploring the performance of the VEM applied to the subsystem describing the electromagnetics. The first set of experiments provide evidence regarding the speed of convergence of the method as well as the divergence-free condition on the magnetic field. In the second set we present a model for magnetic reconnection in a mesh that includes a series of hanging nodes, which we use to calibrate the resolution of the method. The magnetic reconnection phenomenon happens near the center of the domain where the mesh resolution is finer and high resolution is achieved." @default.
- W3157331512 created "2021-05-10" @default.
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- W3157331512 date "2022-01-01" @default.
- W3157331512 modified "2023-09-26" @default.
- W3157331512 title "The Virtual Element Method for the Coupled System of Magneto-Hydrodynamics" @default.
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- W3157331512 doi "https://doi.org/10.1007/978-3-030-95319-5_12" @default.
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