Mapping Method between Variable Finite-Element Meshs in Magnetic-Thermal Simulations

摘要

In the coupled electromagnetic fluid-dynamical and thermal simulations which are done by weak coupling FEM for the electromagnetic devices, as thermal loads energy losses obtained from electromagnetic calculations are transferred between meshes to calculate the temperature distributions by considering the influence of fluid flow. Because the requirements of meshes discretization scheme are quite different between electromagnetic and fluid-thermal fields, the same finite element model is applied to analyze as possible as to meet the both requirements. It will lead to increase the number of meshes and the time of calculation. However, if the different finite element models are used, the data cannot be directly transferred between corresponding meshes. In this paper, a variable mesh mapping method is proposed. The energy losses can be transferred between the different meshes by Gauss integral and coordinate transformation. Moreover, the strategy of precision control and error correction coefficient is proposed to ensure calculation accuracy. This method is applied to an air insulation bus duct system in a literature, the calculation results are compared with the normal same meshes mapping method and experiment results. It provides the validity of the variable meshes mapping method.