APA
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Papadakis, K. E., Pfau‐Kempf, Y., Ganse, U., Battarbee, M., Alho, M., Grandin, M., … Palmroth, M. (2022). Spatial filtering in a 6D hybrid-Vlasov scheme for alleviating AMR artifacts: a case study with Vlasiator, versions 5.0, 5.1, 5.2.1.
Chicago/Turabian
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Papadakis, Konstantinos E., Y. Pfau‐Kempf, U. Ganse, M. Battarbee, M. Alho, M. Grandin, M. Dubart, et al. “Spatial Filtering in a 6D Hybrid-Vlasov Scheme for Alleviating AMR Artifacts: a Case Study with Vlasiator, Versions 5.0, 5.1, 5.2.1” (2022).
MLA
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Papadakis, Konstantinos E., et al. Spatial Filtering in a 6D Hybrid-Vlasov Scheme for Alleviating AMR Artifacts: a Case Study with Vlasiator, Versions 5.0, 5.1, 5.2.1. 2022.
BibTeX Click to copy
@article{konstantinos2022a,
title = {Spatial filtering in a 6D hybrid-Vlasov scheme for alleviating AMR artifacts: a case study with Vlasiator, versions 5.0, 5.1, 5.2.1},
year = {2022},
author = {Papadakis, Konstantinos E. and Pfau‐Kempf, Y. and Ganse, U. and Battarbee, M. and Alho, M. and Grandin, M. and Dubart, M. and Turc, L. and Zhou, Hongyang and Horaites, K. and Zaitsev, I. and Cozzani, G. and Bussov, M. and Gordeev, E. and Tesema, F. and George, H. and Suni, J. and Tarvus, V. and Palmroth, M.}
}
. Numerical simulation models that are used to investigate the near-Earth space plasma environment require sophis-ticated methods and algorithms together with high computational power. Vlasiator 5.0 is a hybrid-Vlasov plasma simulation code that is able to perform 6D (3D in ordinary space and 3D in velocity space) simulations using Adaptive Mesh Refinement (AMR). In this work we describe a side effect of using AMR in Vlasiator 5.0 where the heterologous grid approach creates resolution induced discontinuities due to the different grid resolution levels. The discontinuities cause spurious oscillations 5 in the electromagnetic fields that alter the global results. We present and test a spatial filtering operator for alleviating this artifact without significantly increasing the computational overhead. We demonstrate the operator’s use case in large 6D AMR simulations and evaluate its performance with different implementations. Code and data availability. The Vlasiator simulation code is distributed under the GPL-2 open source license at https://github.com/fmihpc/ 215 vlasiator. In Vlasiator 5.0 (Alfthan et al., 2020) spatial AMR was introduced to enable the 6D simulations. The spatial filtering method as discussed in this work was introduced in Vlasiator 5.1 (Pfau-Kempf et al., 2021). The more efficient triangle filtering operator was introduced in Vlasiator 5.2.1 (Pfau-Kempf et al., 2022). The Analysator software (https://github.com/fmihpc/analysator, Battarbee and the Vlasiator team, 2020) was used to produce the presented figures. Data presented in this paper can be accessed by following the data policy on the Vlasiator web site.