numerical simulation for unsteady helmholtz problems of anisotropic fgms

The unsteady helmholtz type equation of anisotropic functionally graded materials (fgms) is considered in this study. the study is to find numerical solutions to initial boundary value problems governed by the equation. a combined laplace and boundary element method is used to solve the problems. the analysis derives a boundary-only integral equation that is used to compute the numerical solutions. the analysis also results in another class of anisotropic fgms of applications. some problems are considered. the numerical solutions obtained are accurate and consistent.