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An immersed-shell method for modelling fluid–structure interactions

机译:用于模拟流固耦合的沉浸式壳体方法

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摘要

The paper presents a novel method for numerically modelling fluid–structure interactions. The method consists of solving the fluid-dynamics equations on an extended domain, where the computational mesh covers both fluid and solid structures. The fluid and solid velocities are relaxed to one another through a penalty force. The latter acts on a thin shell surrounding the solid structures. Additionally, the shell is represented on the extended domain by a non-zero shell-concentration field, which is obtained by conservatively mapping the shell mesh onto the extended mesh. The paper outlines the theory underpinning this novel method, referred to as the immersed-shell approach. It also shows how the coupling between a fluid- and a structural-dynamics solver is achieved. At this stage, results are shown for cases of fundamental interest.
机译:本文提出了一种对流体-结构相互作用进行数值模拟的新方法。该方法包括在扩展域上求解流体动力学方程,其中计算网格覆盖流体和固体结构。流体和固体的速度通过作用力相互放松。后者作用在围绕固体结构的薄壳上。另外,外壳在扩展域上由非零外壳浓度字段表示,该字段是通过将外壳网格保守地映射到扩展网格上而获得的。本文概述了支持这种新方法的理论,即所谓的“沉没壳法”。它还显示了如何实现流体动力学和结构动力学求解器之间的耦合。在此阶段,将显示具有根本利益的案例的结果。

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