We describe a new, efficient approach to the imposition of exact nonreflecting boundary conditions for the scalar wave equation. We compare the performance of our approach with that of existing methods by coupling the boundary conditions to finite-difference schemes. Numerical experiments demonstrat
On local nonreflecting boundary conditions for time dependent wave propagation
✍ Scribed by Marcus J. Grote; Imbo Sim
- Publisher
- Coastal and Estuarine Research Federation
- Year
- 2009
- Tongue
- English
- Weight
- 847 KB
- Volume
- 30
- Category
- Article
- ISSN
- 1860-6261
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📜 SIMILAR VOLUMES
of the ordinary differential equation which occurs in the boundary condition. An exact nonreflecting boundary condition was derived previously for use with the time dependent wave equation in three Finally, we shall solve a sequence of scattering problems space dimensions. Here it is shown how to c
## Abstract This paper develops a finite element scheme to generate the spatial‐ and time‐dependent absorbing boundary conditions for unbounded elastic‐wave problems. This scheme first calculates the spatial‐ and time‐dependent wave speed over the cosine of the direction angle using the Higdon's on
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In this work we show how to combine in the exact nonre¯ecting boundary conditions (NRBC) ®rst derived by Grote and Keller, the calculation of the exterior (far-®eld) solution for time-dependent radiation and scattering in an unbounded domain. At each discrete time step, radial modes computed on a sp