A New Code for Numerical Simulation of MHD Astrophysical Flows With   Chemistry
  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. 
Igor Kulikov, Igor Chernykh, Viktor Protasov
astro-ph.IM