Title: Numerical simulations of ion and neutral waves in the solar
atmosphere

Authors: Błażej Kuźma, Kris Murawski, Dariusz Wójcik,
Group of Astrophysics, University of Maria Curie-Skłodowska, ul.
Radziszewskiego 10, 20-031 Lublin, Poland

Abstract:
We present results of numerical simulations of ion and neutral waves in the
solar atmosphere that is described by non-adiabatic 2-fluid equations.
These simulations are performed with the use of JOANNA code which adopts
Godunov-type numerical methods. It is demonstrated that collisions between
ions and neutrals determine a number of spectacular phenomena in the
atmosphere such as plasma heating that is sufficient to compensate
radiative losses. Our realistic 2D numerical simulations of plasma
outflows, which are associated with solar granulation, reveal that these
outflows originate the fast solar wind, and they exhibit physical
quantities consistent to the order of magnitude with the observational
estimations for mass and energy losses in the upper chromosphere,
transition region and inner corona. Moreover, the theoretical results are
used to predict variations of dominant period with height in the
atmosphere. A good agreement between the theoretical prediction and recent
observations by VTT on Tenerife and IRIS validates the model and obtained
results.