Simulation of Electromagnetic Flow Meters Using the Boundary Element Method

摘要

This paper presents the simulation and optimization of the magnet system of an electromagnetic flowrnmeter. The boundary element method (BEM) is used to solve the corresponding 3D magnetostaticrnMaxwell equations. A Fredholm integral equation of the second kind for the “microscopic” current onrnthe surface of the paramagnetic pole shoes of the magnet system is derived. Discretizing the integralrnequation leads to a much smaller linear system as an adequate finite element formulation of thernproblem. For selected examples we show how the dramatically reduced computing time and effort forrnmesh preparation facilitates a fast and cost-efficient optimization of the magnet system of thernelectromagnetic flow meter.