Interface error analysis for numerical wave propagation
The numerical error associated with finite-difference simulation of wave propagation in discontinuous media consists of two components. The first component is a higher-order error that leads to grid dispersion; it can be controlled by higher-order methods. The second component results from misalignm...
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| Veröffentlicht in: | Computational geosciences 2009-09, Vol.13 (3), p.363-371 |
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| creator | Symes, William W. Vdovina, Tetyana |
| description | The numerical error associated with finite-difference simulation of wave propagation in discontinuous media consists of two components. The first component is a higher-order error that leads to grid dispersion; it can be controlled by higher-order methods. The second component results from misalignment between numerical grids and material interfaces. We provide an explicit estimate of the interface misalignment error for the second order in time and space staggered finite-difference scheme applied to the acoustic wave equation. Our analysis, confirmed by numerical experiments, demonstrates that the interface error results in a first-order time shift proportional to the distance between the interface and computational grids. A 2D experiment shows that the interface error cannot be suppressed by higher-order methods and indicates that our 1D analysis gives a good prediction about the behavior of the numerical solution in higher dimensions. |
| doi_str_mv | 10.1007/s10596-008-9124-8 |
| format | Article |
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The first component is a higher-order error that leads to grid dispersion; it can be controlled by higher-order methods. The second component results from misalignment between numerical grids and material interfaces. We provide an explicit estimate of the interface misalignment error for the second order in time and space staggered finite-difference scheme applied to the acoustic wave equation. Our analysis, confirmed by numerical experiments, demonstrates that the interface error results in a first-order time shift proportional to the distance between the interface and computational grids. 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| subjects | Earth and Environmental Science Earth Sciences Error analysis Geophysics Geotechnical Engineering & Applied Earth Sciences Hydrogeology Interfaces Mathematical Modeling and Industrial Mathematics Mathematics Original Paper Simulation Soil Science & Conservation Wave propagation |
| title | Interface error analysis for numerical wave propagation |
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