A nested-domain volume-surface integral equation for the Helmholtz equation with heterogeneous density is derived and verified against BEM and FEM-BEM benchmarks.
Sound scattering from a fluid sphere.The Journal of the Acoustical Society of America, 22(4):426–431, 1950
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Nested Volume-Surface Integral Equations for Acoustics
A nested-domain volume-surface integral equation for the Helmholtz equation with heterogeneous density is derived and verified against BEM and FEM-BEM benchmarks.