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Acoustical finite-difference time-domain simulation in a quasi-Cartesian grid

Botteldooren, D.

The Journal of the Acoustical Society of America, 1994-05, Vol.95 (5), p.2313-2319 [Periódico revisado por pares]

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Título:
Acoustical finite-difference time-domain simulation in a quasi-Cartesian grid
Autor: Botteldooren, D.
É parte de: The Journal of the Acoustical Society of America, 1994-05, Vol.95 (5), p.2313-2319
Descrição: The finite-difference time-domain (FDTD) approximation can be used to solve acoustical field problems numerically. Mainly because it is a time-domain method, it has some specific advantages. The basic formulation of the FDTD method uses an analytical grid for the discretization of an unknown field. This is a major disadvantage. In this paper, FDTD equations that allow us to use a nonuniform grid are derived. With this grid, tilted and curved boundaries can be described more easily. This gives a better accuracy to CPU–resource ratio in a number of circumstances. The paper focuses on the new formulation and its accuracy. The problem of automatically generating the mesh in a general situation is not addressed. Simulations using quasi-Cartesian grids are compared to Cartesian grid results.
Idioma: Inglês

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