Generating Optimal Initial Conditions for Smoothed Particle Hydrodynamics Simulations

TL;DR

This paper introduces a novel method for generating initial conditions in SPH simulations using adaptive binning and Voronoi tessellations, improving the ability to meet complex spatial resolution needs.

Contribution

A new initial condition construction method for SPH and N-body simulations based on adaptive Voronoi tessellations, addressing limitations of existing approaches.

Findings

Successfully applied to various simulation scenarios

Can satisfy complex spatial resolution requirements

Demonstrates improved initial condition quality

Abstract

We review existing SPH setup methods and outline their advantages, limitations and drawbacks. We present a new method for constructing initial conditions for smoothed particle hydrodynamics (SPH) simulations, which may also be of interest for N-body simulations, and demonstrate this method on a number of applications. This new method is inspired by adaptive binning techniques using weighted Voronoi tesselations. Particles are placed and iteratively moved based on their proximity to neighboring particles and the desired spatial resolution. This new method can satisfy arbitrarily complex spatial resolution requirements.