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arXiv 1803.03374physics.flu-dynphysics.comp-ph
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流固耦合问题的空间自适应光滑粒子流体动力学方法

A Consistent Spatially Adaptive Smoothed Particle Hydrodynamics Method for Fluid-Structure Interactions

Wei Hu, Guannan Guo, Xiaozhe Hu, Dan Negrut, Zhijie Xu, Wenxiao Pan

摘要:

提出了一种新的流固耦合问题的自适应光滑粒子流体动力学方法。该方法结合了其他SPH方法不能同时满足的几个属性。具体地说,它是二阶收敛的;它允许在空间上适应于任意几何形状的移动(平移和旋转)边界的分辨率;并且,它加速了FSI解决方案,因为自适应方法导致更少的自由度而不牺牲精度。在该方法中的关键成分是一个一致的离散微分算子,一个\textit{posteriori}误差估计/基于距离的自适应标准,和粒子移位技术。应用该方法模拟了六种不同的流动或流固耦合问题。新方法的收敛性,准确性和效率属性进行评估,通过比较它产生的结果与分析,有限元和一致的SPH均匀高分辨率的解决方案,以及实验数据。

英文摘要:

A new consistent, spatially adaptive, smoothed particle hydrodynamics (SPH) method for Fluid-Structure Interactions (FSI) is presented. The method combines several attributes that have not been simultaneously satisfied by other SPH methods. Specifically, it is second-order convergent; it allows for resolutions spatially adapted with moving (translating and rotating) boundaries of arbitrary geometries; and, it accelerates the FSI solution as the adaptive approach leads to fewer degrees of freedom without sacrificing accuracy. The key ingredients in the method are a consistent discretization of differential operators, a \textit{posteriori} error estimator/distance-based criterion of adaptivity, and a particle-shifting technique. The method is applied in simulating six different flows or FSI problems. The new method's convergence, accuracy, and efficiency attributes are assessed by comparing the results it produces with analytical, finite element, and consistent SPH uniform high-resolution solutions as well as experimental data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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