A two-fluid computational model to study magnetic reconnection in reactive plasmas under chromospheric conditions

A. Alvarez Laguna, A. Lani, N. N. Mansour, A. Kosovichev, S. Poedts

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We use a two-fluid (plasma + neutrals) model to simulate the magnetic reconnection in chromospheric conditions. Improved models for characterizing collisional and reactive magnetized partially ionized plasma in the presence of electromagnetic fields are essential to understand the phenomena taking place in astrophysical and laboratory plasmas. Particularly, scenarios where dissipative processes and thermo-chemical non-equilibrium play an important role are beyond the classical single-fluid MHD representation. The governing equations of the multi-fluid model used include two loosely-coupled systems: the reactive two-fluid equations and the full Maxwell equations complemented with two additional divergence cleaning equations for enforcing numerically the two Gauss's laws. A second-order cell-centered Finite Volume method for unstructured grids is used to discretize both systems. In particular, a variant of the AUSM+-up scheme is used to tackle the two-fluid equations, while Steger-Warming scheme is chosen for treating Maxwell equations. The unsteady simulation is advanced in time with an implicit three-point Backward Euler scheme. Results of the reconnection process are presented showing clear differences in the velocities and path of the neutrals compared to the ions that respond to the effect of the electromagnetic fields. Also shown are the different evolutions of the density of neutrals and ions that interact through chemical reactions.

Original languageEnglish (US)
Title of host publication11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014
EditorsAntonio Huerta, Eugenio Onate, Xavier Oliver
PublisherInternational Center for Numerical Methods in Engineering
Pages2268-2279
Number of pages12
ISBN (Electronic)9788494284472
StatePublished - Jul 1 2014
EventJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014 - Barcelona, Spain
Duration: Jul 20 2014Jul 25 2014

Publication series

Name11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014

Other

OtherJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014
CountrySpain
CityBarcelona
Period7/20/147/25/14

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Computational Theory and Mathematics
  • Computer Science Applications
  • Mechanical Engineering

Keywords

  • Finite volume method
  • Magnetic reconnection
  • Magnetohydrodynamics (MHD)
  • Multi-fluid
  • Plasma
  • Solar physics

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