Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-12-15
Astronomy and Astrophysics
Astrophysics
5 pages, 3 figures, conference proceedings of the Torun Exoplanets 2008
Scientific paper
10.1051/eas/1042030
We present a new multi-fluid, grid MHD code PIERNIK, which is based on the Relaxing TVD scheme (Jin and Xin, 1995). The original scheme (see Trac & Pen (2003) and Pen et al. (2003)) has been extended by an addition of dynamically independent, but interacting fluids: dust and a diffusive cosmic ray gas, described within the fluid approximation, with an option to add other fluids in an easy way. The code has been equipped with shearing-box boundary conditions, and a selfgravity module, Ohmic resistivity module, as well as other facilities which are useful in astrophysical fluid-dynamical simulations. The code is parallelized by means of the MPI library. In this paper we introduce the multifluid extension of Relaxing TVD scheme and present a test case of dust migration in a two-fluid disk composed of gas and dust. We demonstrate that due to the difference in azimuthal velocities of gas and dust and the drag force acting on both components dust drifts towards maxima of gas pressure distribution.
Hanasz Michał
Kornet Kacper
Kowalik Kacper
Pawłaszek Rafał
Wóltański Dominik
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