LANIMFE / LiquidsStructure.jl

Julia library that provides routines to calculate the structure factor of liquids

LiquidsStructure.jl

This library intended to provide a mean to compute the structure factor of a variety of model liquids with different interaction potentials and under different approximation schemes (e.g. Percus–Yevick closure for the Ornstein–Zernike relation for a hard-sphere liquid) in the Julia programming language.

Status

For the time being this library provides routines to calculate the structure factor of:

• hard spheres under the Percus–Yevick closure for the Ornstein–Zernike (OZ) equation,
• hard spheres under the Percus–Yevick closure with Verlet–Weis corrections,
• hard disks under the Rosenfeld FMT approximation,
• dipolar hard spheres under the MSA approximation.

TODO

• Documentation
• Add more interaction potentials and approximation schemes

Installation

LiquidsStructure.jl is compatible with Julia 1.0 and later versions. It requires first adding the LANIMFE-Registy to your Julia installation. Then it can simply be installed by running

julia> ]
pkg> add LiquidsStructure

Usage

Once installed, run

using LiquidsStructure

The structure factor can be calculated by constructing a StructureFactor(::Liquid, ::ApproximationScheme) object S, and then using S as a function over the wavevector k (S(k)).

As an example, let us plot the structure factor for a hard spheres liquid with a volume fraction η = 0.4, under the Verlet–Weis approximation scheme

julia> using LiquidsStructure
julia> using Plots
julia> η = 0.4;
julia> S = StructureFactor(HardSpheres(η), VerletWeis);
julia> plot(k -> S(k), 0, 10π, label = "S(k)")

Acknowledgements

This project was developed with support from CONACYT through the Laboratorio Nacional de Ingeniería de la Materia Fuera de Equilibrio (LANIMFE).