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Coarse-graining dense, deformable active particles

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arxiv 2501.07280 v1 pith:FSV4DQKM submitted 2025-01-13 cond-mat.soft physics.bio-ph

classification cond-mat.softphysics.bio-ph
keywords activedeformableparticlesaspectcellscontinuumellipsesratio
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We coarse-grain a model of closely-packed ellipses that can vary their aspect ratio to derive continuum equations for materials comprising confluent deformable particles such as epithelial cell layers. We show that contractile nearest neighbour interactions between ellipses can lead to their elongation and nematic ordering. Adding flows resulting from active hydrodynamic stresses produced by the particles also affects the aspect ratio and can result in active turbulence. Our results, which agree well with multi-phase field simulations of deformable isotropic cells, provide a bridge between models which explicitly resolve cells and continuum theories of active matter.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Towards a two-scale model for morphogenesis -- How cellular processes influence tissue deformations

    cond-mat.soft 2025-06 conditional novelty 6.0 of 10

    A two-scale model coupling cell-scale multiphase-field dynamics to tissue-scale Helfrich bending reproduces known vesicle shapes and shows that neighbor-dependent bending rigidity can break symmetry and rotate the tissue.

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