Building time-dependent temperature field in a multi-field coupling system

Solving time-dependent field remains challenging in most situations due to convergence difficulty. In this paper, we systematically research the solving method of the time-dependent temperature field in case of a multi-field coupling system, including mesh partition methods, decoupling strategies, iterative algorithms, etc. We apply our method to an apparatus called “Curie Point Engine”. In the example, a nickel disc located in an inhomogeneous magnetic field is heated asymmetrically, and then is driven to rotate around the axle by the asymmetrical magnetic force. In this case, the temperature field, magnetic field and the motion of the disc are all time-dependent and coupled. We apply the dynamic mesh method due to the motion of the disk. The validity of our method is confirmed by comparing the simulation results to our experimental images of a Curie Point Engine recorded by a thermal imager.