B. Majumdar

Simulation of Initial Ribbon Formation during Planar Flow Melt Spinning Process

Planar flow melt spinning (PFMS) is a rapid solidification process to produce amorphous ribbons for transformer core applications. The present study deals with the development of 3dimensional time-dependent model, for the numerical simulation of ribbon formation during the PFMS process. Space between nozzle wall and the rotating wheel is considered as the computational domain. Volume of fluid technique is applied along with energy and momentum equations to simulate the two phase flow in the domain. Effect of ejection temperature of the melt is investigated during ribbon formation. Ribbon patterns like dimple and continuous are obtained for different ejection temperatures. Phenomenon of air entrainment which leads to dimple pattern is discussed. Vacuum conditions are suggested to avoid air entrainment.