A purely hyperbolic discontinuous Galerkin approach for self-gravitating gas dynamics

M Schlottke-Lakemper, AR Winters, H Ranocha… - Journal of …, 2021 - Elsevier
One of the challenges when simulating astrophysical flows with self-gravity is to compute the
gravitational forces. In contrast to the hyperbolic hydrodynamic equations, the gravity field is …

[HTML][HTML] Simple model of multi-scale and multi-site emissions for porous ionic liquid electrospray thrusters

K Takagi, Y Yamashita, R Tsukizaki… - Journal of Applied …, 2024 - pubs.aip.org
Ionic liquid electrospray thrusters represent an alternative propulsion method for spacecraft
to conventional plasma propulsion because they do not require plasma generation, which …

High-order central-upwind shock capturing scheme using a boundary variation diminishing (BVD) algorithm

AS Chamarthi, SH Frankel - Journal of Computational Physics, 2021 - Elsevier
In this paper, we present a novel hybrid nonlinear explicit-compact scheme for shock-
capturing based on a boundary variation diminishing (BVD) reconstruction. In our approach …

Efficient high-order gradient-based reconstruction for compressible flows

AS Chamarthi - Journal of Computational Physics, 2023 - Elsevier
This paper extends the gradient-based reconstruction approach of Chamarthi [1] to genuine
high-order accuracy for inviscid test cases involving smooth flows. A seventh-order accurate …

Two-dimensional hybrid model of gradient drift instability and enhanced electron transport in a Hall thruster

R Kawashima, K Komurasaki - Physics of Plasmas, 2021 - pubs.aip.org
An axial–azimuthal two-dimensional Hall thruster discharge model was developed for
analyzing gradient drift instability (GDI) and cross field electron transport enhancement …

First order hyperbolic approach for anisotropic diffusion equation

AS Chamarthi, H Nishikawa, K Komurasaki - Journal of Computational …, 2019 - Elsevier
In this paper, we present a high order finite difference solver for anisotropic diffusion
problems based on the first-order hyperbolic system method. In particular, we demonstrate …

[HTML][HTML] Numerical methods and macroscopic models of magnetically confined low temperature plasmas

F Deluzet, J Narski, M Ndiaye, G Hagelaar… - Kinetic and Related …, 2023 - aimsciences.org
In this paper a hierarchy of macroscopic plasma models is derived for the numerical study of
magnetically confined low temperature plasmas with a specific interest in plasma thrusters …

A fast convergence fourth-order Vlasov model for Hall thruster ionization oscillation analyses

W Zhexu, R Kawashima… - Plasma Science and …, 2021 - iopscience.iop.org
Abstract A 1D1V hybrid Vlasov-fluid model was developed for this study to elucidate
discharge current oscillations of Hall thrusters (HTs). The Vlasov equation for ions velocity …

Effects of Tip Curvature on Multiple Emitted Ion Beams in Porous Ionic Liquid Electrospray Thrusters

K Takagi, R Tsukizaki, Y Yamashita… - AIAA SCITECH 2024 …, 2024 - arc.aiaa.org
Ionic liquid electrospray thrusters represent an innovative propulsion technology and a
promising alternative to plasma propulsion in the recent demand for low-power and high …

Deep-ultraviolet optoelectronic devices enabled by the hybrid integration of next-generation semiconductors and emerging device platforms

N Alfaraj - 2019 - repository.kaust.edu.sa
In this dissertation, the design and fabrication of deep-ultraviolet photodetectors were
investigated based on gallium oxide and its alloys, through the heterogeneous integration …