[HTML][HTML] Conservative closures of the Vlasov-Poisson equations based on symmetrically weighted Hermite spectral expansion

O Issan, O Koshkarov, FD Halpern, B Kramer… - Journal of …, 2025 - Elsevier
We derive conservative closures for the Vlasov-Poisson equations discretized in velocity via
the symmetrically weighted Hermite spectral expansion. We demonstrate that no closure can …

Effects of Artificial Collisions, Filtering, and Nonlocal Closure Approaches on Hermite-based Vlasov-Poisson Simulations

O Issan, O Chapurin, O Koshkarov… - arxiv preprint arxiv …, 2024 - arxiv.org
Kinetic simulations of collisionless plasmas are computationally challenging due to phase
space mixing and filamentation, resulting in fine-scale velocity structures. This study …

Conservative Closures of the Vlasov-Poisson Equations Discretized with a Symmetrically Weighted Hermite Spectral Expansion in Velocity

O Issan, O Koshkarov, FD Halpern, B Kramer… - arxiv preprint arxiv …, 2024 - arxiv.org
We derive conservative closures of the Vlasov-Poisson equations discretized in velocity via
the symmetrically weighted Hermite spectral expansion. The short note analyzes the …