论文标题
弯曲表面上的主动列表流
Active nematic flows on curved surfaces
论文作者
论文摘要
细胞单层是组织生物物理学的中央模型系统。在体内，上皮组织在微米的尺度上弯曲，并且曲率在自发组织流的发作中的作用仍然没有得到充分理解。在这里，我们提出了一种曲线上根尖不对称活性列凝胶的流体动力学理论。我们表明，与扁平空间相比，表面曲率在质量上改变了单层运动：所得流程可能是无阈值的，并且向运动的过渡可能会从连续变为不连续。表面曲率，摩擦和活动术都显示出可控制所选的流动模式：从简单的剪切到涡旋链。
Cell monolayers are a central model system to tissue biophysics. In vivo, epithelial tissues are curved on the scale of microns, and curvature's role in the onset of spontaneous tissue flows is still not well-understood. Here, we present a hydrodynamic theory for an apical-basal asymmetric active nematic gel on a curved strip. We show that surface curvature qualitatively changes monolayer motion compared to flat space: the resulting flows can be thresholdless, and the transition to motion may change from continuous to discontinuous. Surface curvature, friction and active tractions are all shown to control the flow pattern selected: from simple shear to vortex chains.
