### Abstract

Language | English |
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Title of host publication | Computer Methods in Mathematics |

Subtitle of host publication | Advanced Structured Materials |

Publisher | Springer |

Pages | 3-17 |

Number of pages | 15 |

Volume | 1 |

Edition | 1 |

DOIs | |

Publication status | Published - 2010 |

### Publication series

Name | Computer Methods in Mathematics: Advanced Structured Materials |
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Publisher | Springer |

### Fingerprint

### Keywords

- acoustic wave equation
- finite element analysis
- spectral elements

### Cite this

*Computer Methods in Mathematics: Advanced Structured Materials*(1 ed., Vol. 1, pp. 3-17). (Computer Methods in Mathematics: Advanced Structured Materials). Springer. https://doi.org/10.1007/978-3-642-05241-5_1

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*Computer Methods in Mathematics: Advanced Structured Materials.*1 edn, vol. 1, Computer Methods in Mathematics: Advanced Structured Materials, Springer, pp. 3-17. https://doi.org/10.1007/978-3-642-05241-5_1

**Explicit discrete dispersion relations for the acoustic wave equation in d-dimensions using finite element, spectral element and optimally blended schemes.** / Ainsworth, Mark; Wajid, Hafiz Abdul; Support of MA by the Engineering and Physical Sciences Research Council under grant (Funder).

Research output: Chapter in Book/Report/Conference proceeding › Chapter

TY - CHAP

T1 - Explicit discrete dispersion relations for the acoustic wave equation in d-dimensions using finite element, spectral element and optimally blended schemes

AU - Ainsworth, Mark

AU - Wajid, Hafiz Abdul

AU - Support of MA by the Engineering and Physical Sciences Research Council under grant (Funder)

PY - 2010

Y1 - 2010

N2 - We study the dispersive properties of the acoustic wave equation for finite element, spectral element and optimally blended schemes using tensor product elements defined on rectangular grid in d-dimensions. We prove and give analytical expressions for the discrete dispersion relations for the above mentioned schemes. We find that for a rectangular grid (a) the analytical expressions for the discrete dispersion error in higher dimensions can be obtained using one dimensional discrete dispersion error expressions; (b) the optimum value of the blending parameter is p/(p + 1) for all p ∈ ℕ and for any number of spatial dimensions; (c) the optimal scheme guarantees two additional orders of accuracy compared with both finite and spectral element schemes; and (d) the absolute accuracy of the optimally blended scheme is and times better than that of the pure finite and spectral element schemes respectively.

AB - We study the dispersive properties of the acoustic wave equation for finite element, spectral element and optimally blended schemes using tensor product elements defined on rectangular grid in d-dimensions. We prove and give analytical expressions for the discrete dispersion relations for the above mentioned schemes. We find that for a rectangular grid (a) the analytical expressions for the discrete dispersion error in higher dimensions can be obtained using one dimensional discrete dispersion error expressions; (b) the optimum value of the blending parameter is p/(p + 1) for all p ∈ ℕ and for any number of spatial dimensions; (c) the optimal scheme guarantees two additional orders of accuracy compared with both finite and spectral element schemes; and (d) the absolute accuracy of the optimally blended scheme is and times better than that of the pure finite and spectral element schemes respectively.

KW - acoustic wave equation

KW - finite element analysis

KW - spectral elements

U2 - 10.1007/978-3-642-05241-5_1

DO - 10.1007/978-3-642-05241-5_1

M3 - Chapter

VL - 1

T3 - Computer Methods in Mathematics: Advanced Structured Materials

SP - 3

EP - 17

BT - Computer Methods in Mathematics

PB - Springer

ER -