论文标题
Cosserat流体结构相互作用的数值研究
Numerical Study of Cosserat Fluid-Structure Interaction in a Monolithic Eulerian Framework
论文作者
论文摘要
我们提出了一种单片的欧拉（Eulerian）变分制，以非经典性的连续性描述，用于分析微观结构级别的微粘度参数。在这方面，通过考虑微旋转的颗粒自由度来考虑Cosesrat流体结构相互作用CFSI现象。提出了CFSI问题的管理方程式和变异公式。空间和时间域通过有限元方法和半平方材方案离散。使用FreeFem ++实现和评估该模型。通过计算众所周知的基准问题Flustruk-fsi-3*来分析本模型，其中考虑使用圆柱体附着的标志的流量用于数值测试。获得的结果表明，振荡和微旋转粘度的幅度崩溃而变化，微粘度参数对微旋转场具有显着影响，与速度场相比。
We propose a monolithic Eulerian variational formulation in non-classical sense of continuum description for the analysis of micro-viscosity parameters at micro-structural level. In this respect, Cosesrat fluid-structure interaction CFSI phenomena is taken into account by considering micro-rotational degrees of freedom of the particles. The governing equations and variational formulation for CFSI problem are presented. The space and time domains are discretized by the finite element method and semi-implicit scheme. The model is implemented and evaluated using FreeFem++. The present model is analyzed by computing a well known benchmark problem FLUSTRUK-FSI-3*, where the flow around a flag attached with cylinder is considered for numerical test. The obtained results suggest that the amplitude of oscillations and micro-rotational viscosity varies inversely and micro-viscosity parameter exhibit a significant effect on micro-rotation field as compare to velocity field.
