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arXiv 2603.07367cond-mat.softphysics.bio-ph
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不均匀环境中主动流体图案化

Active Fluid Patterning in Inhomogeneous Environments

University of Oxford(牛津大学)

Douglas MacMyn Brown, Alexander Mietke

AI总结:

本研究提出了一种模型,探讨不均匀环境如何通过摩擦作用调控主动流体中的图案形成与自组织。

摘要:

生物细胞和组织中的主动应力驱动了许多发育过程。然而,越来越多的实验证据表明,与周围材料的额外机械相互作用在引导这些过程方面也起着关键作用。我们引入了一个最小模型来描述这一场景,并研究了如何通过不均匀环境控制主动材料中的图案形成。具体来说,我们考虑了一种主动流体,其中一种化学物质调节局部主动应力,并通过由此产生的流动进行重新分布。我们证明了此类流体中的主动应力图案表现出摩擦趋性,并系统地刻画了不均匀外部摩擦如何影响机槭化学图案形成不稳定性。我们发现流体动力学筛选在调解摩擦图案与主动流体自组织之间的相互作用中起关键作用,并识别出一种机槭化学摩擦机制,该机制导致由不均匀摩擦引起的图案振荡。

英文摘要:

Active stresses in biological cells and tissues drive many developmental processes. However, increasing experimental evidence suggests that additional mechanical interactions with surrounding material can play a crucial role in guiding these processes. We introduce a minimal model of this scenario and investigate how pattern formation in an active material can be controlled by an inhomogeneous environment. Specifically, we consider an active fluid in which a chemical species regulates local active stresses and is redistributed by the resulting flows. We show that active stress patterns within such a fluid exhibit frictiotaxis and systematically characterize how inhomogeneous external friction affects mechanochemical pattern formation instabilities. We find that hydrodynamic screening plays a crucial role in mediating the cross-talk between friction patterns and active fluid self-organization and identify a mechanochemical frustration mechanism that gives rise to pattern oscillations caused by inhomogeneous friction.

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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