计算竖壁集热器，在自然对流情况下流场以及温度场分布的cfd用户程序-Calculate vertical wall collector, in the case of natural convection field and temperature distribution downstream of the cfd user program

利用有限差分法，计算传热学温度分布数值解，并会出温度场网格图。-Finite difference method to calculate the temperature distribution in the numerical solution of heat transfer, and will be a temperature field grid graph.