A hybrid adaptive multiresolution approach for the efficient simulation of reactive flows

Computational studies that use block-structured adaptive mesh refinement (AMR) approaches suffer from unnecessarily high mesh resolution in regions adjacent to important solution features. This deficiency limits the performance of AMR codes. In this work a novel hybrid adaptive multiresolution (HAMR) approach to AMR-based calculations is introduced to address this issue. The multiresolution (MR) smoothness indicators are used to identify regions of smoothness on the mesh where the computational cost of individual physics solvers may be decreased by replacing direct calculations with interpolation. We suggest an approach to balance the errors due to the adaptive discretization and the interpolation of physics quantities such that the overall accuracy of the HAMR solution is consistent with that of the MR-driven AMR solution. The performance of the HAMR scheme is evaluated for a range of test problems, from pure hydrodynamics to turbulent combustion. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

This study introduces a novel hybrid adaptive multiresolution (HAMR) approach to AMR-based calculations, which addresses the issue of unnecessarily high mesh resolution in regions adjacent to important solution features. By utilizing multiresolution smoothness indicators, the computational cost of individual physics solvers can be decreased through interpolation in smooth regions, resulting in improved performance of AMR codes.