<p>In this study, the influence of a pulsed magnetic field (PMF) on the evolution of physical fields within a Cu–Fe alloy melt was systematically investigated using a two-dimensional transient multiphysics model developed in COMSOL Multiphysics. The magnetic flux density, induced current density, and Lorentz force were observed to be directly proportional to the applied current amplitude, while remaining largely insensitive to frequency variation. In contrast, increasing the pulse duration from 1.7 to 17 ms resulted in a reduction of the peak electromagnetic parameters. The PMF generated distinct vortex structures within the melt, characterized by a maximum radial Lorentz force located at the intermediate height of the molten alloy. These vortices, driven primarily by the rotational component of the Lorentz force, produced a symmetric toroidal flow pattern consisting of clockwise and counterclockwise circulations within the upper and lower regions of the melt, respectively. Such flow behavior promoted enhanced mixing and homogenization of both the temperature and solute concentration fields. Initially, the temperature distribution exhibited a ring-like profile because of electromagnetic induction heating. As solidification progressed, the temperature field gradually evolved toward a more uniform distribution, accompanied by a transition in the dominant heat-transfer mechanism from convection-controlled to conduction-dominated transport. The improved thermal and flow uniformity achieved under PMF conditions is expected to suppress macrosegregation and contribute to refinement of the solidified microstructure in the Cu–Fe alloy system.</p>