Numerical results for two media with different properties show that the proposed initial guesses improve computational efficiency and reduce the influence of nonlinear solver on the time step as well.

• 对两种不同性质的介质进行数值实验，结果表明，所设计的初值选取方法不仅大大提高了计算效率，而且能够降低非线性解法器对时间步长的影响。