SIMULATION OF BIDIRECTIONAL FLUID-STRUCTURE INTERACTION BASED ON EXPLICIT COUPLING APPROACHES OF LATTICE BOLTZMANN AND P-FEM SOLVERS
SIMULATION OF BIDIRECTIONAL FLUID-STRUCTURE INTERACTION BASED ON EXPLICIT COUPLING APPROACHES OF LATTICE BOLTZMANN AND P-FEM SOLVERS
复制标题
基于格子玻尔兹曼和 P-FEM 求解器显式耦合方法的双向流固耦合模拟
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
E. Rank
中科院分区：
文献类型：
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作者：
S. Geller;J. Tölke;M. Krafczyk;D. Scholz;A. Düster;E. Rank
在过去的几年里，源自动力学理论的格子玻尔兹曼方法已经成熟，成为在小马赫数极限下求解纳维-斯托克斯方程的有效方法。在我们的方法中，我们将基于非结构化四叉树/八叉树欧拉网格的流体流动 LB 求解器与基于拉格朗日描述的结构力学 p-FEM 求解器结合起来，以预测双向流体-结构相互作用。在简要介绍了格子玻尔兹曼方法和有限元方法的p版本的基本概念之后，提出了耦合算法。由于底层的欧拉 LB 网格，讨论了在移动结构的情况下流体节点的激活/停用问题，并指出了一些解决策略。
In the last few years the Lattice Boltzmann method which has been derived from kinetic theory, has matured as an ecient approach to solve the Navier-Stokes equa- tions in the limit of small Mach numbers. In our approach we couple a LB-solver for fluid flow based on unstructured quadtree/octree Eulerian grids with a p-FEM-solver for struc- ture mechanics based on a Lagrangian description to predict bidirectional fluid-structure interaction. After a brief introduction of the fundamental concepts of the Lattice Boltz- mann method and the p-Version of the Finite Element Method, the coupling algorithm is presented. Due to the underlying Eulerian LB-grid, problems with regard to the acti- vation/deactivation of fluid nodes in case of moving structures are discussed and some solution strategies are indicated.