Artificial boundary conditions for certain evolution PDEs with cubic nonlinearity for non-compactly supported initial data

作者：Vaibhav V^*

来源：Journal of Computational Physics, 2011, 230(8): 3205-3229.

DOI：10.1016/j.jcp.2011.01.024

• Artificial boundary conditions
• Nonlinear evolution equations
• Non-compactly supported initial data

The paper addresses the problem of constructing non-reflecting boundary conditions for two types of one dimensional evolution equations, namely, the cubic nonlinear Schrodinger (NLS) equation, partial derivative(t)u + Lu - i chi vertical bar u vertical bar(2)u = 0 with L -i partial derivative(2)(x), and the equation obtained by letting L partial derivative(3)(x). The usual restriction of compact support of the initial data is relaxed by allowing it to have a constant amplitude along with a linear phase variation outside a compact domain. We adapt the pseudo-differential approach developed by Antoine et al. (2006) [5] for the NLS equation to the second type of evolution equation, and further, extend the scheme to the aforementioned class of initial data for both of the equations. In addition, we discuss efficient numerical implementation of our scheme and produce the results of several numerical experiments demonstrating its effectiveness.

• 出版日期2011-4-20