PIERNIK mhd程序-松弛TVD格式（IV）的多流体非理想扩展
PIERNIK mhd code - a multi-fluid, non-ideal extension of the relaxing-TVD scheme (IV)
摘要：
本文提出了一个新的多流体、网格MHD程序PIERNIK，它是基于Jin & Xin（1995）的松弛TVD格式。最初的方案（见Trac & Pen（2003）and Pen et al.（2003））被扩展为增加了动力学独立但相互作用的流体：尘埃和扩散宇宙射线气体，在流体近似中描述，并可以选择以简单的方式添加其他流体。该代码已配备了剪切盒边界条件，和一个自重力模块，欧姆电阻率模块，以及其他设施，这是有用的天体物理流体动力学模拟。代码通过MPI库并行化。在本文中，我们提出了一个扩展的PIERNIK，这是专为模拟的扩散传播的宇宙线（CR）分量的磁化ISM。
英文摘要：
We present a new multi-fluid, grid MHD code PIERNIK, which is based on the Relaxing TVD scheme (Jin & 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 present an extension of PIERNIK, which is designed for simulations of diffusive propagation of the Cosmic-Ray (CR) component in the magnetized ISM.
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