An Improved Procedure for Selecting the Profiles of Perfectly Matched Layers
This work provides an incremental improvement to PML profile selection for wave propagation simulations, benefiting computational scientists using frequency-domain methods.
The authors improve the procedure for selecting perfectly matched layer (PML) profiles by extending the function class and using a direct search method, achieving lower discrete reflectivity for traveling waves in frequency domain simulations.
The perfectly matched layers (PMLs), as a boundary termination over an unbounded spatial domain, are widely used in numerical simulations of wave propagation problems. Given a set of discretization parameters, a procedure to select the PML profiles based on minimizing the discrete reflectivity is established for frequency domain simulations. We, by extending the function class and adopting a direct search method, improve the former procedure for traveling waves.