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Related Experiment Video

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Generation of Aggregates of Mouse Embryonic Stem Cells that Show Symmetry Breaking, Polarization and Emergent Collective Behaviour In Vitro

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Interplay of model ingredients affecting aggregate shape plasticity in diffusion-limited aggregation.

P Duarte-Neto¹, T Stošić², B Stošić²

¹Departamento de Estatística e Informática, Universidade Federal Rural de Pernambuco, 52171-900 Recife, Brazil and Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|August 15, 2014

Summary

This study reveals how surface tension, particle flow, and particle source influence aggregate shape and roughness. Combining these factors enhances aggregate shape plasticity for modeling natural growth processes.

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Area of Science:

Physical Chemistry
Materials Science
Computational Physics

Background:

Aggregation processes are common in nature, forming diverse structures.
Previous models often analyzed factors like surface tension, particle flow, and source individually.

Purpose of the Study:

To investigate the combined effects of surface tension, particle flow, and particle source on aggregation models.
To understand how these factors influence aggregate shape, roughness, and plasticity.

Main Methods:

Extensive numerical simulations were performed.
The study explored various underlying lattice structures.
The interplay of surface tension, particle flow, and particle source was analyzed.

Main Results:

Particle location and flow direction significantly impact aggregate shape.
Surface tension is the primary determinant of surface roughness.
The combined model shows increased aggregate shape plasticity.

Conclusions:

The synergistic effect of these factors is crucial for modeling polymorphic growth.
This approach is applicable to diverse natural structures like rocks, crystals, corals, and biominerals.
The model provides insights into growth in confined geometries and external fields.