“…(3), and the anode boundary is the edge of LTE. Gaussian model of arc heat flux, arc pressure and current density is adopted as many previous researches (Cho and Na, 2009;Lho and Na, 1991;Kim and Na, 1992;Lee and Na, 1996;Kim et al, 2003). The effective radius of arc, therefore, should be extracted accurately to conduct the Gaussian fitting.…”