Articles | Volume 15, issue 20
Development and technical paper
27 Oct 2022
Development and technical paper |  | 27 Oct 2022

Spatial filtering in a 6D hybrid-Vlasov scheme to alleviate adaptive mesh refinement artifacts: a case study with Vlasiator (versions 5.0, 5.1, and 5.2.1)

Konstantinos Papadakis, Yann Pfau-Kempf, Urs Ganse, Markus Battarbee, Markku Alho, Maxime Grandin, Maxime Dubart, Lucile Turc, Hongyang Zhou, Konstantinos Horaites, Ivan Zaitsev, Giulia Cozzani, Maarja Bussov, Evgeny Gordeev, Fasil Tesema, Harriet George, Jonas Suni, Vertti Tarvus, and Minna Palmroth

Model code and software

Vlasiator Pfau-Kempf, Yann and Von Alfthan, Sebastian and Sandroos, Arto and Ganse, Urs and Koskela, Tuomas and Battarbee, Markus and Hannuksela, Otto Akseli and Honkonen, Ilja and Papadakis, Kostis and Grandin, Maxime and Pokhotelov, DImitry and Zhou, Hongyang and Kotipalo, Leo and Alho, Markku

fmihpc/vlasiator: Vlasiator 5.0 S. von Alfthan, Y. Pfau-Kempf, A. Sandroos, U. Ganse, O. Hannuksela, I. Honkonen, M. Battarbee, T. Koskela, and D. Pokhotelov

fmihpc/vlasiator: Vlasiator 5.1 Y. Pfau-Kempf, S. Von Alfthan, A. Sandroos, U. Ganse, T. Koskela, M. Battarbee, O. A. Hannuksela, I. Honkonen, K. Papadakis, M. Grandin, D. Pokhotelov, H. Zhou, L. Kotipalo, and M. Alho

fmihpc/analysator: v0.9 (v0.9) Markus Battarbee, Otto Akseli Hannuksela, Yann Pfau-Kempf, Sebastian von Alfthan, Urs Ganse, Riku Jarvinen, Leo, Jonas Suni, Markku Alho, lturc, Ilja, tvbrito, and Maxime Grandin

Short summary
Vlasiator is a plasma simulation code that simulates the entire near-Earth space at a global scale. As 6D simulations require enormous amounts of computational resources, Vlasiator uses adaptive mesh refinement (AMR) to lighten the computational burden. However, due to Vlasiator’s grid topology, AMR simulations suffer from grid aliasing artifacts that affect the global results. In this work, we present and evaluate the performance of a mechanism for alleviating those artifacts.