A New Code for Numerical Simulation of MHD Astrophysical Flows With Chemistry

TL;DR

This paper introduces a novel low-dissipation numerical code for simulating magnetohydrodynamic astrophysical flows with chemical reactions, emphasizing hydrogen chemodynamics and turbulent molecular cloud formation.

Contribution

It presents an original numerical method combining operator splitting and piecewise-parabolic techniques for MHD simulations with chemistry.

Findings

Validated the code with main tests

Demonstrated parallel implementation

Modeled hydrogen chemodynamics in turbulent clouds

Abstract

The new code for numerical simulation of magnetic hydrodynamical astrophysical flows with consideration of chemical reactions is given in the paper. At the heart of the code - the new original low-dissipation numerical method based on a combination of operator splitting approach and piecewise-parabolic method on the local stencil. The details of the numerical method are described; the main tests and the scheme of parallel implementation are shown. The chemodynamics of the hydrogen while the turbulent formation of molecular clouds is modeled.