Numerical Methods: FEM, BEM, and Solvers
The Corrosion Module in COMSOL Multiphysics® uses both the Finite Element Method (FEM), discretizing the volume leading to a sparse system matrix, and the Boundary Element Method (BEM), discretizing only the boundaries and edges using integral equations, leading to a dense system matrix. In this video, we walk you through the model building process step-by-step and demonstrate how to use the Current Distribution, Boundary Elements interface, which can be used to model corrosion in slender structures and large electrolyte domains. You can follow along by opening a new session of COMSOL Multiphysics. Finally, we go over best practices regarding making changes to the solver, such as when you run out of memory or when switching between geometric multigrid and algebraic multigrid solvers for faster computation time, as well as making changes to the discretization settings, such as using second order Lagrange elements to increase accuracy when working with sacrificial anodes.
Further Learning
- Tutorial model: Corrosion Protection of Multiple Oil Platforms
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