4 papers
Geometric numerical discretization of a quasineutral hybrid model of drift-kinetic electrons and fully kinetic ions
Nishant Narechania, Guo Meng, Emil Poulsen +1
We extend the geometric electromagnetic particle-in-cell (PIC) framework, GEMPICX, to solve the quasineutral hybrid Vlasov-Maxwell equations with drift-kinetic electrons and fully…
Geometric numerical discretization of electromagnetic quasineutral models
Nishant Narechania, Emil Poulsen, Eric Sonnendrucker
In this work, the geometric electromagnetic Particle-in-Cell (PIC) framework, GEMPICX, is extended to solve the quasineutral, fully kinetic Vlasov-Maxwell equations on dual grids u…
Radiation-magnetohydrodynamics with MPI-AMRVAC using flux-limited diffusion
Nishant Narechania, Rony Keppens, Asif ud-Doula +2
Context. Radiation plays a significant role in solar and astrophysical environments as it may constitute a sizeable fraction of the energy density, momentum flux, and the total pre…
Suppression of photospheric velocity fluctuations in strongly magnetic O-stars in radiation-magnetohydrodynamic simulations
A. ud-Doula, J. O. Sundqvist, N. Narechania +3
O-stars generally show clear signs of strong line-broadening (in addition to rotational broadening) in their photospheric absorption lines (typically referred to as 'macroturbulenc…