有限差分法在静态电磁场计算中的应用

介绍了采用有限差分法求解特殊边界条件下二维静态电场问题，并将电磁场数值方法的思想体现在处理过程中。对场域中的电势、电位进行了具体的分析和计算，给出了用C语言进行编程计算得到场量数据的流程图，最后利用MATLAB强大的绘图功能对结果进行可视化。由文章研究问题所得图形结果可以清晰的看出静电场中的电势线及电场线的分布，同时也验证了电场线与等电位线相互垂直，以及电势在媒质分界面连续的经典理论。

Application of finite difference method in calculating of electric and magnetic field problem

The finite difference method for solving the two-dimensional static electric field problem in special boundary conditions is introduced, and the thought of numerical methods of electromagnetic field is embodied in the treatment process. A concrete analysis and calculation of the electric field and potential in the given domain is carried out, and the flow chart using C pro- gram to obtain the electric field data is given in this paper. At last, MATLAB＇s powerful graphic function is used to visualize the results. According to the graphic results, we can clearly see the distribution of the electric field and the potential in a static electric field,meanwhile, the classical theory that the equipotential lines and the electric field lines are perpendicular, as well as the potential at the media interface are continuous,are validated.