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Electromagnetism Solver

The Elec­tro­mag­net­ism solver solves the Maxwell equa­tions in the Ed­dy cur­rent (in­duc­tion-­dif­fu­sion) ap­prox­i­ma­tion. This is suit­able for cas­es where the prop­a­ga­tion of elec­tro­mag­net­ic waves in air (or vac­u­um) can be con­sid­ered as in­stan­ta­neous. There­fore, the wave prop­a­ga­tion is not solved. The main ap­pli­ca­tions are mag­net­ic met­al form­ing or weld­ing, in­duced heat­ing, and so forth. The EM mod­ule al­lows the in­tro­duc­tion of a source of elec­tri­cal cur­rent in­to sol­id con­duc­tors and the com­pu­ta­tion of the as­so­ci­at­ed mag­net­ic field, elec­tric field, as well as in­duced cur­rents. The EM solver is cou­pled with the struc­tur­al me­chan­ics solver (the Lorentz forces are added to the me­chan­ics equa­tions of mo­tion), and with the struc­tur­al ther­mal solver (the ohmic heat­ing is added to the ther­mal solver as an ex­tra source of heat). The EM fields are solved us­ing a Fi­nite El­e­ment Method (FEM) for the con­duc­tors and a Bound­ary El­e­ment Method (BEM) for the sur­round­ing air/­in­su­la­tors. Thus no air mesh is nec­es­sary.