A FEM method for magnetic induction tomography forward problem

This paper is focus on the forward problem of 3-D magnetic induction tomography. Finite element method (FEM) has been used to analyse and calculate the problem. The analysis process performed by ANSYS software. First, we establish a 3-D solid model of magnetic imaging system. Then we mesh it to FE model by meshing tools. Using, the A̅, A̅ - φ method to indicate governing equation for reducing calculated amount. A̅ is magnetic vector potential, and A̅ is electric scalar potential. The discrete equations are Established by Galekin finite element discretization format, and solve them by using sparse matrix direct solution. In order to study the influence on the results of meshing density, this paper uses 3 different meshing methods for comparing and analyzing results. Simulation results show that the meshing density affects the results in different ways. Although the absolute values of SCR are changed, but the linear relation between SCR and conductivity is good.