No. 2021.15
A Wavelet-Free Approach for Multiresolution-Based Grid Adaptation for Conservation Laws
N. Gerhard, S. Müller, and A. Sikstel
Subject: 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 defined 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.