A practical spectral method for hyperbolic conservation laws

Details A practical spectral method for hyperbolic conservation laws A practical spectral method for hyperbolic conservation laws

2002-12-26

arxiv.org/abs/math/0212346v1

Mathematics

Numerical Analysis

41 pages

Scientific paper

A class of high-order lowpass filters, the discrete singular convolution (DSC) filters, is utilized to facilitate the Fourier pseudospectral method for the solution of hyperbolic conservation law systems. The DSC filters are implemented directly in the Fourier domain (i.e., windowed Fourier pseudospectral method), while a physical domain algorithm is also given to enable the treatment of some special boundary conditions. By adjusting the effective wavenumber region of the DSC filter, the Gibbs oscillations can be removed effectively while the high resolution feature of the spectral method can be retained. The utility and effectiveness of the present approach is validated by extensive numerical experiments.

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