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

The purpose of this work is to quantify the electromagnetic perturbati on induced by a conductor subjected to a velocity field in the earth m agnetic field, by using the finite element software Flux Expert [4]. T he resolution variables are chosen in order to reduce the number of un knowns and to improve the precision. Because of the possible orientati ons 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 th e temporal dependence in the Maxwell equations. Because our problems a re linear, a general problem is reconstructed by a linear combination of three elementary ones. The comparison of our results with analytica l solutions obtained from simplified models confirm their validity.