论文标题
PKDGRAV3中的无网格流体力学用于银河系模拟
Mesh-free hydrodynamics in PKDGRAV3 for galaxy formation simulations
论文作者
论文摘要
我们将最新的N体码PKDGRAV3扩展到了无网状气体流体动力学以进行宇宙模拟。已经实施了两个新的流体动力求解器，即无网状有限体积和无网状有限质量方法。求解器明显地节省了质量，动量和能量，并已通过广泛的标准测试模拟（包括宇宙学模拟）进行了验证。我们还描述了用于执行流体动力模拟的PKDGRAV3的改进。这些变化是考虑到效率和模块化的，为实施星系形成和进化物理学以及对GPU的未来移植的所需模块提供了坚实的基础。该代码与文档以及本工作中介绍的所有测试模拟一起发布。
We extend the state-of-the-art N-body code PKDGRAV3 with the inclusion of mesh-free gas hydrodynamics for cosmological simulations. Two new hydrodynamic solvers have been implemented, the mesh-less finite volume and mesh-less finite mass methods. The solvers manifestly conserve mass, momentum and energy, and have been validated with a wide range of standard test simulations, including cosmological simulations. We also describe improvements to PKDGRAV3 that have been implemented for performing hydrodynamic simulations. These changes have been made with efficiency and modularity in mind, and provide a solid base for the implementation of the required modules for galaxy formation and evolution physics and future porting to GPUs. The code is released in a public repository, together with the documentation and all the test simulations presented in this work.
