FINITE-ELEMENT CALCULATION OF ELECTROMAGNETIC-FIELDS DUE TO MOVING SEA-WATER

The purpose of this work is to quantify the electromagnetic perturbation induced by a conductor subjected to a velocity field in the earth magnetic field, by using the finite element software Flux Expert [4]. The resolution variables are chosen in order to reduce the number of unknowns and to improve the precision. Because of the possible orientations of the different fields the problem is a three-dimensional one. If a frame related to the perturbation is defined, one can get rid of the temporal dependence in the Maxwell equations. Because our problems are linear, a general problem is reconstructed by a linear combination of three elementary ones. The comparison of our results with analytical solutions obtained from simplified models confirm their validity.