Extension of a sharp-interface immersed-boundary method for simulating parachute inflation

IF 2.9 3区 工程技术 Q2 ENGINEERING, MECHANICAL
Yang Zhang, Tianmei Pu, He Jia, Shiqing Wu, Chunhua Zhou
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引用次数: 0

Abstract

In this work, the sharp-interface immersed boundary (IB) method proposed by Mittal et al. (J Comput Phys 227(10):4825–4852, 2008) is extended to fluid-structure-interaction (FSI) simulation of parachute inflation by utilizing several open-source tools. The method employs a Cartesian-grid ghost-cell methodology to accurately represent the immersed boundary, and it is suitable for solving moving-boundary flows with arbitrarily complex geometries. The finite-element code CalculiX is employed to solve the structural dynamics of the parachute system. The IB flow solver is coupled with CalculiX in a minimally-invasive manner using the multi-physics coupling library preCICE. The implicit fluid-structure coupling together with the Aitken adaptive under-relaxation scheme is considered to improve the numerical accuracy and stability. The developed approach is validated by a benchmark FSI case. Numerical experiments on the inflation process of several typical parachutes are further conducted. The breathing process, flow structure, canopy displacement and drag coefficient are analyzed to demonstrate the applicability of the present approach for simulating parachute inflation.
扩展用于模拟降落伞充气的锐面沉浸边界法
在这项工作中,利用几个开源工具,将米塔尔等人(J Comput Phys 227(10):4825-4852, 2008)提出的尖锐界面沉浸边界(IB)方法扩展到降落伞充气的流固耦合(FSI)模拟。该方法采用笛卡尔网格幽灵单元方法精确表示浸没边界,适用于求解任意复杂几何形状的移动边界流。有限元代码 CalculiX 用于求解降落伞系统的结构动力学。利用多物理场耦合库 preCICE,以最小侵入方式将 IB 流量求解器与 CalculiX 进行耦合。隐式流体-结构耦合与 Aitken 自适应欠松弛方案相结合,提高了数值精度和稳定性。一个基准 FSI 案例验证了所开发的方法。此外,还对几个典型降落伞的充气过程进行了数值实验。分析了呼吸过程、流动结构、伞篷位移和阻力系数,以证明本方法适用于模拟降落伞充气。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.50
自引率
4.30%
发文量
35
审稿时长
11 weeks
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