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首页> 外文期刊>Journal of Computational Physics >An immersed boundary method for smoothed particle hydrodynamics of self-propelled swimmers
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An immersed boundary method for smoothed particle hydrodynamics of self-propelled swimmers

机译:自航游泳者光滑粒子流体动力学的沉浸边界方法

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摘要

We present a novel particle method, combining remeshed Smoothed Particle Hydrodynamics with Immersed Boundary and Level Set techniques for the simulation of flows past complex deforming geometries. The present method retains the Lagrangian adaptivity of particle methods and relies on the remeshing of particle locations in order to ensure the accuracy of the method. In fact this remeshing step enables the introduction of Immersed Boundary Techniques used in grid based methods. The method is applied to simulations of flows of isothermal and compressible fluids past steady and unsteady solid boundaries that are described using a particle Level Set formulation. The method is validated with two and three-dimensional benchmark problems of flows past cylinders and spheres and it is shown to be well suited to simulations of large scale simulations using tens of millions of particles, on flow-structure interaction problems as they pertain to self-propelled anguilliform swimmers. (C) 2008 Elsevier Inc. All rights reserved.
机译:我们提出了一种新颖的粒子方法,将经过修正的平滑粒子流体动力学与浸入式边界和水平集技术相结合,用于模拟经过复杂变形几何形状的流动。本方法保留了粒子方法的拉格朗日适应性,并且依赖于粒子位置的重新划分以确保该方法的准确性。实际上,重新网格化步骤可以引入基于网格的方法中使用的浸入边界技术。该方法适用于模拟通过稳态和非稳态固体边界的等温和可压缩流体的流动,这些流动使用粒子水平集公式进行了描述。该方法已通过流经圆柱和球体的二维和三维基准问题进行了验证,结果表明该方法非常适合使用数千万个粒子的大规模模拟的仿真,涉及与自身有关的流固耦合问题推进的gu形游泳者。 (C)2008 Elsevier Inc.保留所有权利。

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