Matrix-based, finite-difference algorithms for computational acousticsA compact numerical algorithm is introduced for simulating multidimensional acoustic waves. The algorithm is expressed in terms of a set of matrix coefficients on a three-point spatial grid that approximates the acoustic wave equation with a discretization error of O(h exp 5). The method is based on tracking a local phase variable and its implementation suggests a convenient coordinate splitting along with natural intermediate boundary conditions. Results are presented for oblique plane waves and compared with other procedures. Preliminary computations of acoustic diffraction are also considered.
Document ID
19910027835
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Davis, Sanford (NASA Ames Research Center Moffett Field, CA, United States)