One of my current major projects is the application of our computer code ALPS, which stands for Arbitrary Linear Plasma Solver. ALPS is a numerical solver for the full hot-plasma dispersion relation in a plasma with arbitrary background distribution functions. The numerical code determines the behaviour of kinetic plasma waves including relativistic effects. More details can be found on http://www.alps.space.
Our solver NHDS (The New Hampshire Dispersion Relation Solver) calculates the linear hot-plasma dispersion relation in a plasma consisting of drifting bi-Maxwellians. The code is publicly available at https://github.com/danielver02/NHDS, and the code paper can be found here.
HolmMHD is a versatile numerical code that solves the nonlinear set of equations of isotropic, polytropic, ideal magnetohydrodynamics (MHD) on a Cartesian grid in three dimensions. It uses a hybrid spatial discretisation based on a fourth-order central scheme and the Rusanov scheme, which are mixed through a min-mod flux limiter.
The code performs well on a range of benchmark problems such as a spherical hydro-blast wave, the Orszag-Tang vortex, Alfvén waves in one and three dimensions, the MHD aligned rotator, an isotropic three-dimensional decaying-turbulence setup, and the Kelvin-Helmholtz instability (shown on the right-hand side). The code is publicly available at https://github.com/danielver02/HolmMHD, and the code paper can be found here.
Our simulation work based on particle-in-cell simulations has led to a number of press releases and articles:
- El Tiempo: Un colombiano lidera equipo que busca revelar secretos del plasma (in Spanish)
- Daily Mail online: Why solar winds are 10 TIMES hotter than expected when they hit Earth: Streams stay so hot because of magnetic connections that form in the turbulence, study reveals
- UKRI: Supercomputer simulations unlock an old space weather puzzle
- UCL: Supercomputer simulations unlock space weather puzzle