流体流动与相变传热的数值模拟课程的课堂小作业，ADI算法，采用有线差分法，计算二维平板的流体稳态流动时的热扩散稳态。-Fluid flow and phase change heat transfer numerical simulation of a small classroom course work, ADI algorithm, using the cable difference method to calculate the flat two-dimensional steady-state flow of fluid when the steady-state thermal diffusion.