论文标题
基于块的自适应粒子细化SPH方法，用于流体结构问题
A Block-based Adaptive Particle Refinement SPH Method for Fluid-Structure Interaction Problems
论文作者
论文摘要
已经开发了多分辨率方法，例如自适应颗粒细化（APR）方法，以增加局部粒子分辨率，因此在预定义的改进区内的溶液质量，而不是使用全球均匀的分辨率用于平滑的粒子流体动力学（SPH）。但是，有时，靶向的目标区域可能会有所不同，并且相应的拓扑非常复杂，因此常规的APR方法无法自适应地跟踪这些特征。在这项研究中，开发了一种基于块的新型自适应颗粒改进（BAPR）方法，该方法能够灵活地为任何有针对性的特征提供必要的局部细化，并自适应地跟踪它。在BAPR中，块阵列的所谓激活状态定义了改进区域，其中相应地确定了过渡和激活区域。开发了新激活块中生成的颗粒的正则化方法，以渲染这些新粒子的各向同性分布。提出的方法已被部署用于模拟流体结构相互作用（FSI）问题。已经使用建议的BAPR方法模拟了一组2D FSI案例，并对BAPR方法的性能进行了量化和全面验证。总而言之，BAPR方法是可行的，并且通过跟踪任何目标的目标特征来进行复杂的多分辨率FSI模拟。
The multi-resolution method, e.g., the Adaptive Particle Refinement (APR) method, has been developed to increase the local particle resolution and therefore the solution quality within a pre-defined refinement zone instead of using a globally uniform resolution for Smoothed Particle Hydrodynamics (SPH). However, sometimes, the targeted zone of interest can be varying, and the corresponding topology is very complex, thus the conventional APR method is not able to track these characteristics adaptively. In this study, a novel Block-based Adaptive Particle Refinement (BAPR) method is developed, which is able to provide the necessary local refinement flexibly for any targeted characteristic, and track it adaptively. In BAPR, the so-called activation status of the block array defines the refinement regions, where the transition and activated zones are determined accordingly. A regularization method for the generated particles in the newly activated blocks is developed to render an isotropic distribution of these new particles. The proposed method has been deployed for simulating Fluid-Structure Interaction (FSI) problems. A set of 2D FSI cases have been simulated with the proposed BAPR method, and the performance of the BAPR method is quantified and validated comprehensively. In a word, the BAPR method is viable and potential for complex multi-resolution FSI simulations by tracking any targeted characteristic of interest.
