SIMULATION METHOD, SIMULATION UNIT, AND PROGRAM

There is provided a simulation method of a current change suitable for suppressing an increase in a calculation time. A change in a current flowing through a current path when a voltage applied to the path is changed is simulated in a system including the path and a member that is acted upon by the current flowing through the path and affects the current flowing through the path. First, the path and the member are represented by aggregates of a plurality of particles. Electromagnetic action from the other particles to each of the plurality of particles configuring the path is calculated based on a current value at a present time of the current flowing through the path and a voltage value of an external voltage applied to the path. The current flowing through the path is calculated based on a calculation result of the electromagnetic action to update the value of the current flowing through the path from the value at the present time to a value obtained by a calculation.