Euler equations of generalized Riemann variable are derived from unsteady primitive variable Euler equations and solved by using two - a point-two-step upwind finite difference method.
该方法将原参数非定常欧拉方程组重新组合成以广义黎曼变量表示的欧拉方程组，再用二点二步迎风格式离散求解。
To solve it numerically, we use a moving mesh method, two upwind difference discretizations (simple upwind scheme and midpoint upwind scheme) are applied.
为了对其数值求解，采用移动网格方法，使用了两种迎风差分格式(一般迎风格式和中点迎风格式)。
The upwind finite-difference method is used for traveltime calculations;
用逆风有限差分方法计算程函方程；
The upwind finite-difference method is used for traveltime calculations;
用逆风有限差分方法计算程函方程；
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