Riemannapproximate solver

• 黎曼近似解

Riemannapproximate solver的用法和样例：

例句

1. Under the framework of finite volume method,the Riemann approximate solver is applied to obtain the numerical solution of the equation.
   模型在有限体积法框架下应用黎曼近似解求得耦合方程的数值解。