Absorbing Boundary Conditions for Diffusion Equations

摘要

We present a technique for constructing absorbing boundary conditions for211u001ediffusion equations from Neumann operators. The symbol of the Neumann operator is 211u001eapproximated by a rational interpolant with symmetric interpolation points. The 211u001eabsorbing boundary conditions thus obtained is used in the diffusion split step 211u001ein the internal wave model.