Reference map technique for incompressible fluid-structure interaction
Reference map technique for incompressible fluid-structure interaction
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DOI：
10.1017/jfm.2020.353
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发表时间：
2020-09-10
影响因子：
3.7
通讯作者：
Kamrin, Ken
中科院分区：
文献类型：
--
作者：
Rycroft, Chris H.;Wu, Chen-Hung;Kamrin, Ken
我们提出了一个通用的模拟方法的流固相互作用的基础上完全欧拉参考地图技术。该方法允许建模的一个或多个可变形的连续体固体与流体相互作用，并与彼此。这种方法的一个主要优点是易于使用，因为固体和流体在同一固定网格上离散，这大大简化了相之间的耦合。我们使用的方法来研究一些说明性的例子，涉及不可压缩的Navier-Stokes流体与多个neo-Hookean固体相互作用。我们的方法具有几个有用的功能，包括对具有尖角的固体进行建模的能力和对驱动固体进行建模的能力。后者允许模拟活跃的媒体，如游泳运动员，我们证明。该方法是验证有利的旗帜挥舞的几何形状，其中一些实验，数值和分析研究已经进行。我们扩展了薄旗极限的扑翼分析，揭示了一个额外的不稳定机制，诱导扑翼。
We present a general simulation approach for fluid-solid interactions based on the fully Eulerian reference map technique. The approach permits the modelling of one or more finitely deformable continuum solid bodies interacting with a fluid and with each other. A key advantage of this approach is its ease of use, as the solid and fluid are discretized on the same fixed grid, which greatly simplifies the coupling between the phases. We use the method to study a number of illustrative examples involving an incompressible Navier-Stokes fluid interacting with multiple neo-Hookean solids. Our method has several useful features including the ability to model solids with sharp corners and the ability to model actuated solids. The latter permits the simulation of active media such as swimmers, which we demonstrate. The method is validated favourably in the flag-flapping geometry, for which a number of experimental, numerical and analytical studies have been performed. We extend the flapping analysis beyond the thin-flag limit, revealing an additional destabilization mechanism to induce flapping.