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首页> 外文期刊>Journal of Computational Physics >A fast, robust, and non-stiff Immersed Boundary Method
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A fast, robust, and non-stiff Immersed Boundary Method

机译:快速,鲁棒且非刚性的浸入边界方法

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摘要

We propose a fast and non-stiff approach for the solutions of the Immersed Boundary Method, for Newtonian, incompressible flows in two or three dimensions. The proposed methodology is built on a robust semi-implicit discretization introduced by Peskin in the late 70s which is solved efficiently through the novel use of a fast, treecode strategy to compute flow-structure interactions. Optimal multipole-type expansions are performed numerically by solving a least squares problem with a new, fast iterative algorithm. The new Immersed Boundary Method is particularly well suited for three-dimensional applications and/or for problems where the number of immersed boundary points is large. We demonstrate the efficacy and superiority of the method over existing approaches with two simple but illustrative examples in 3D.
机译:对于二维或三维的牛顿不可压缩流,我们为浸入边界方法的求解提出了一种快速且非刚性的方法。所提出的方法是建立在Peskin在70年代后期提出的稳健的半隐式离散化基础上的,该离散化通过使用新颖的快速树码策略来计算流结构相互作用而得到有效解决。通过使用新的快速迭代算法求解最小二乘问题,可以在数值上执行最佳多极型展开。新的浸入边界方法特别适合于三维应用程序和/或浸入边界点数量大的问题。我们通过两个简单但示例性的3D实例证明了该方法相对于现有方法的有效性和优越性。

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