用于CFD的，二维WENO格式的求解器，NS方程，二阶龙格库塔方法。-2D solver for NS equation using WENO method, 2 order Runge-kutta mehtod.

This file conclude of five codes , four of them in Mathematica program and one in C++. 1. Erk4.nb. this code represent the explicit Runge Kutta method of order four for solving first order ODE. 2. RK45.nb This code represent the Embedded Runge Ku

Solves 2D sine function using 5th order WENO and 3rd order Runge-Kutta