Electric discharge machining simulation

i am trying to simulate better magnetic and electric fields to get better material removal and surface finish in Electrical discharge Machining........which module i have to choose in COMSOL.......will rotary machine,magnetic magnetic and electric charged particle tracing dc discharge plasma modules work?

i am attaching the corresponding research paper--------magnetic force assisted EDM

plz help me
Aditya,
M.Tech. CAD/CAM
adityareddipalli@gmail.com
919963814117