NUMERICAL ANALYSIS OF THE EFFECT OF LASER RADIATION ON THE PLASMA OF A WELDING ARC V. N. Startsev UDC 621.791.75:621.373.826; 621.9.048.7 The process of interaction between laser radiation and the plasma of a welding arc is investigated numerically. The equations of continuity, momentum, and energy of viscous flow and the equations of electric-current flow and laser-radiation transfer are employed. JEPTER7492019995 JEPTER749205