Communications on Applied Mathematics and Computation ›› 2022, Vol. 4 ›› Issue (1): 108-142.doi: 10.1007/s42967-020-00101-6

• ORIGINAL PAPERS • 上一篇    下一篇

A Wavelet-Free Approach for Multiresolution-Based Grid Adaptation for Conservation Laws

Nils Gerhard, Siegfried Müller, Aleksey Sikstel   

  1. Institut für Geometrie und Praktische Mathematik, RWTH Aachen, Templergraben 55, Aachen 52056, Germany
  • 收稿日期:2020-06-22 修回日期:2020-11-03 出版日期:2022-03-20 发布日期:2022-03-01
  • 通讯作者: Siegfried Müller, Nils Gerhard, Aleksey Sikstel E-mail:mueller@igpm.rwth-aachen.de;gerhard@igpm.rwth-aachen.de;sikstel@igpm.rwth-aachen.de

A Wavelet-Free Approach for Multiresolution-Based Grid Adaptation for Conservation Laws

Nils Gerhard, Siegfried Müller, Aleksey Sikstel   

  1. Institut für Geometrie und Praktische Mathematik, RWTH Aachen, Templergraben 55, Aachen 52056, Germany
  • Received:2020-06-22 Revised:2020-11-03 Online:2022-03-20 Published:2022-03-01
  • Contact: Siegfried Müller, Nils Gerhard, Aleksey Sikstel E-mail:mueller@igpm.rwth-aachen.de;gerhard@igpm.rwth-aachen.de;sikstel@igpm.rwth-aachen.de

摘要: In recent years the concept of multiresolution-based adaptive discontinuous Galerkin (DG) schemes for hyperbolic conservation laws has been developed. The key idea is to perform a multiresolution analysis of the DG solution using multiwavelets defned on a hierarchy of nested grids. Typically this concept is applied to dyadic grid hierarchies where the explicit construction of the multiwavelets has to be performed only for one reference element. For non-uniform grid hierarchies multiwavelets have to be constructed for each element and, thus, becomes extremely expensive. To overcome this problem a multiresolution analysis is developed that avoids the explicit construction of multiwavelets.

关键词: Discontinuous Galerkin, Grid adaptivity, Multiwavelets, Multiresolution analysis, Conservation laws

Abstract: In recent years the concept of multiresolution-based adaptive discontinuous Galerkin (DG) schemes for hyperbolic conservation laws has been developed. The key idea is to perform a multiresolution analysis of the DG solution using multiwavelets defned on a hierarchy of nested grids. Typically this concept is applied to dyadic grid hierarchies where the explicit construction of the multiwavelets has to be performed only for one reference element. For non-uniform grid hierarchies multiwavelets have to be constructed for each element and, thus, becomes extremely expensive. To overcome this problem a multiresolution analysis is developed that avoids the explicit construction of multiwavelets.

Key words: Discontinuous Galerkin, Grid adaptivity, Multiwavelets, Multiresolution analysis, Conservation laws

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