Influence of workpiece height on the induction heating process

A set of 2D steady state finite element numerical simulations of electromagnetic fields, eddy currents distribution and induction heating pattern was performed for different heights of a metal workpiece. Comparison between the calculation results show the height of the workpiece body with respect to the induction coil has a marked effect on the electromagnetic field distribution, eddy currents profile, heating structure and coil efficiency in the system. If the workpiece height is equal to or less than the coil height, then overheating at the workpiece ends is high and makes a nonuniform heating pattern along the workpiece wall.