高阶PE算法及其在非局部边界条件中的应用

High order parabolic equation algorithm and its application to non-local boundary condition

文章通过引入 Padé逼近构造高阶抛物线方程 ( PE)算法 ,用非局部边界条件 ( NL BC)作为吸收边界条件 ,截断计算区域以模拟无界空间波的传播 ,结合高阶 PE算法分别计算不同角度平面波的入射问题。数值计算结果表明随着入射角度的增加 ,必须借助于高阶 PE算法并结合

A Padé approximation is introduced to construct high order parabolic equation(PE) algorithms. In order to imitate the unbounded space wave propagation,the non-local boundary condition is used as the absorption boundary condition to cut off the computation domain,and the problems of plane wave incidence at different angles are calculated with the high order PE algorithm. Numerical results show that in order to solve the problem of wide angle wave propagation in the unbounded space,it is necessary to combine the high order PE algorithm with the non-local boundary condition.