Simulating Hydrodynamics in Cosmology with CRK-HACC by Nicholas Frontiere et al. on Wednesday 23 November

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.

arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2202.02840v2