论文标题
使用CRK-HACC模拟宇宙学中的流体动力学
Simulating Hydrodynamics in Cosmology with CRK-HACC
论文作者
论文摘要
我们介绍了CRK-HACC，这是硬件/混合加速宇宙学代码（HACC）的扩展，以在宇宙的大规模结构形成模拟中解决气体流体动力学。新框架将HACC重力N体求解器与现代平滑粒子流体动力学（SPH）方法融合在一起。 $\underline{\text{C}}$onservative $\underline{\text{R}}$eproducing $\underline{\text{K}}$ernel $\underline{\text{SPH}}$ utilizes smoothing functions that exactly interpolate linear fields while manifestly preserving conservation laws (momentum, mass, and 活力）。 CRKSPH方法已被合并为准确地模拟宇宙学模拟中的重型效应 - 这是针对即将进行的观察性调查的精确合成天空预测产生的重要补充。 CRK-HACC继承了HACC求解器的CodeSign策略，并旨在在现代GPU加速超级计算机上运行。在这项工作中，我们总结了主要求解器组件，并提供了许多标准验证测试，以证明代码准确性，包括理想化的流体动力学和宇宙学设置以及自相似度测量。
We introduce CRK-HACC, an extension of the Hardware/Hybrid Accelerated Cosmology Code (HACC), to resolve gas hydrodynamics in large-scale structure formation simulations of the universe. The new framework couples the HACC gravitational N-body solver with a modern smoothed particle hydrodynamics (SPH) approach called CRKSPH. $\underline{\text{C}}$onservative $\underline{\text{R}}$eproducing $\underline{\text{K}}$ernel $\underline{\text{SPH}}$ utilizes smoothing functions that exactly interpolate linear fields while manifestly preserving conservation laws (momentum, mass, and energy). The CRKSPH method has been incorporated to accurately model baryonic effects in cosmology simulations - an important addition targeting the generation of precise synthetic sky predictions for upcoming observational surveys. CRK-HACC inherits the codesign strategies of the HACC solver and is built to run on modern GPU-accelerated supercomputers. In this work, we summarize the primary solver components and present a number of standard validation tests to demonstrate code accuracy, including idealized hydrodynamic and cosmological setups, as well as self-similarity measurements.
