非结构网格FVTD中二次函数重构技术用于电磁计算

提出了一种适用于非结构网格下格子中心型时域有限体积方法的基于最小平方法的二次函数重构技术以取代以往采用的线性重构技术,包括插值模板的选择和重构函数的确定.通过对典型的电磁场本征值问题及散射问题的计算验证,表明了文中方法较以往方法大大改善了算法的耗散性,提高精度的同时可以显著地减少CPU时间和存储量.

FVTD Algorithm on Unstructured Meshes Using Quadratic Polynomial Reconstruction for 3D Computational Electromagnetics

A cell-centered FVTD algorithm on unstructured meshes using least square based quadratic polynomial re- construction is presented to substitute the previous one which uses linear function reconstruction, including the selection of interpolation stencils and the building of the reconstruction function. The numerical validation and the comparison with the FVTD algorithm adopting traditional linear function reconstruction by calculating several typical electromagnetic resonant and scattering problems show that the presented method can greatly improve the dissipation of the algorithm and has the advanta- ges of higher accuracy, reducing CPU time and saving computational memory.