Investigation of coupled analysis methods for three-dimensional magnetohydrodynamic flows under alternating-current magnetic fields

Abstract

A weak coupling method or strong coupling method is used for coupled analysis of interaction among multiple fields, and it is important to choose an appropriate method which assures reasonable computation time for a three-dimensional calculation without deteriorating solution accuracy. In this study, we introduce an iterative partitioned coupling (IPC) method into a numerical scheme for computation of magnetohydrodynamic flows to assess reliability of the weak coupling scheme used in our previous work. Under conditions that the effect of the flow field on the electromagnetic field is small, it is shown that the solution obtained by the IPC scheme is more reliable than that obtained by the weak coupling scheme when the time increment is not small enough to yield a solution converged with respect to time. On the other hand, it is confirmed that the solution obtained by the weak coupling scheme agrees well with that obtained by the IPC scheme when the time increment is sufficiently small.