Simulating Hydrodynamics in Cosmology with CRK-HACC
Simulating Hydrodynamics in Cosmology with CRK-HACC
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DOI：
10.3847/1538-4365/aca58d
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发表时间：
2022-02
期刊：
影响因子：
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通讯作者：
N. Frontiere;J. D. Emberson;M. Buehlmann;Joseph Adamo;Salman Habib;K. Heitmann;C. Faucher-Giguère
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文献类型：
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作者：
N. Frontiere;J. D. Emberson;M. Buehlmann;Joseph Adamo;Salman Habib;K. Heitmann;C. Faucher-Giguère
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。 - 粒子流体动力学（SPH）方法称为保守的繁殖核SPH（CRKSPH）。虽然明显地保存了保护定律（量，质量和能量） HACC求解器的代码策略，旨在在现代GPU加速超级计算机上运行。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 conservative reproducing kernel SPH (CRKSPH). CRKSPH 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.