Overview

The following page gives a rough overview of important parts of the code.

Program flow

To initiate a simulation, the goal is to solve an ordinary differential equation, for example, by employing the time integration schemes provided by OrdinaryDiffEq.jl. These schemes are then utilized to integrate $\mathrm{d}u/\mathrm{d}t$ and $\mathrm{d}v/\mathrm{d}t$, where $u$ represents the particles' positions and $v$ their properties such as velocity and density. During a single time step or an intermediate step of the time integration scheme, the functions drift! and kick! are invoked, followed by the functions depicted in this diagram (with key parts highlighted in orange/yellow).

Structure

What we refer to as schemes are various models such as Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) or Total Lagrangian Smoothed Particle Hydrodynamics (TLSPH). These schemes are categorized based on the applicable physical regimes, namely fluid, solid, gas, and others. Each scheme comprises at least two files: a system.jl file and an rhs.jl file. The system.jl file provides the data structure holding the particles of this scheme and some routines, particularly those for allocation and the main update routines, excluding system interactions. The interactions between particles of this scheme (and with particles of other schemes) are handled in the rhs.jl file.