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arXiv 2501.07280cond-mat.softphysics.bio-ph
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致密可变形活性粒子的粗粒化

Coarse-graining dense, deformable active particles

Mehrana R. Nejad, Julia M Yeomans

AI总结:

针对汇合可变形活性粒子材料的建模问题,对紧密堆积可变形椭圆粒子模型粗粒化推导连续介质方程,揭示相互作用与活性流动的影响,结果与多相场模拟吻合,搭建细胞模型与活性物质连续理论的桥梁。

摘要:

我们对紧密堆积、可改变纵横比的椭圆粒子模型进行粗粒化,推导出由汇合可变形粒子(如上皮细胞层)构成的材料的连续介质方程。研究表明,椭圆粒子间的收缩性最近邻相互作用可导致粒子伸长并形成向列序。加入由粒子产生的活性流体力学应力所引发的流动,也会影响纵横比并可导致活性湍流。我们的结果与可变形各向同性细胞的多相场模拟吻合良好,在显式解析细胞的模型与活性物质连续介质理论之间搭建了桥梁。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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