Numerical code SELFAS-3 and electrodynamic aggregation of magnetized nanodust

TL;DR

The paper introduces SELFAS-3, a parallel numerical code for simulating electrodynamic aggregation of magnetized nanodust, capturing transitions from random ensembles to filamentary and fractal structures.

Contribution

It presents a novel parallel computational tool that models complex electrodynamic aggregation processes in magnetized nanodust systems, including current dynamics and structural evolution.

Findings

Successful simulation of filamentary and fractal nanodust structures.

Modeling of electric current dynamics in evolving nanodust networks.

Illustration of magnetic dipole growth in different plasma environments.

Abstract

The principles of the parallel numerical code SELFAS-3 are presented. The code modifies previous version of the code to enable parallel computations of electrodynamic aggregation in a many-body system of basic blocks which are taken as strongly magnetized thin rods (i.e., one-dimensional static magnetic dipoles), with electric conductivity and static electric charge, screened with its own static plasma sheath. The aggregation modelling includes the electric current dynamics in a complicated evolving network to describe the processes of external and internal electric short-circuiting. The code enables the continuous modelling of a transition between the following states: randomly situated ensemble of solitary basic blocks; electric current-carrying filamentary system; restructured filamentary network with a trend towards a fractal skeletal structuring. The latter trend is illustrated with generation of a bigger magnetic dipole in (i) homogeneous random ensemble between the biased electrodes in the presence of a plasma electric current filament and (ii) random ensemble around a straight linear nanodust filament with inhomogeneous distribution of the trapped magnetic flux along the filament.