Towards development of enhanced fully-Lagrangian mesh-free computational methods for fluid-structure interaction
Towards development of enhanced fully-Lagrangian mesh-free computational methods for fluid-structure interaction
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DOI：
10.1007/s42241-018-0005-x
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发表时间：
2018-02
影响因子：
2.5
通讯作者：
Abbas Khayyer;H. Gotoh;Hosein Falahaty;Y. Shimizu
中科院分区：
文献类型：
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作者：
Abbas Khayyer;H. Gotoh;Hosein Falahaty;Y. Shimizu
采用完全拉格朗日无网格计算方法，模拟了不可压缩流体与弹性结构的相互作用。基于投影的流体模型（运动粒子半隐式（MPS））以数学物理一致的方式与牛顿或哈密顿拉格朗日结构模型（MPS或HMPS）耦合。流体模型建立在Navier-Stokes方程和连续性方程的解的基础上。结构模型可以在基于线动量和角动量守恒的牛顿力学框架下配置，也可以在基于不可压缩弹性动力学变分原理的哈密顿力学框架下配置。在基于投影的流体模型（enhanced MPS）中引入了一套增强方案，因此，所开发的流固耦合求解器（FSI）被称为enhanced MPS-MPS和enhanced MPS- hmps。此外，考虑了作者正在开发的两种基于光滑粒子流体动力学（SPH）的FSI求解器，并简要讨论了它们与基于mps的FSI求解器的潜在适用性和可比性。通过将基于投影的不可压缩SPH （ISPH）流体模型与基于SPH的牛顿/哈密顿结构模型耦合，建立了基于SPH的FSI求解器，得到了Enhanced ISPH-SPH和Enhanced ISPH- hsph。通过弹性板上的静水柱、弹性铝梁的高速冲击、船用板的水弹性撞击和带弹性闸的溃坝等基准试验，对求解器的性能进行了对比研究。
Simulation of incompressible fluid flow-elastic structure interactions is targeted by using fully-Lagrangian mesh-free computational methods. A projection-based fluid model (moving particle semi-implicit (MPS)) is coupled with either a Newtonian or a Hamiltonian Lagrangian structure model (MPS or HMPS) in a mathematically-physically consistent manner. The fluid model is founded on the solution of Navier-Stokes and continuity equations. The structure models are configured either in the framework of Newtonian mechanics on the basis of conservation of linear and angular momenta, or Hamiltonian mechanics on the basis of variational principle for incompressible elastodynamics. A set of enhanced schemes are incorporated for projection-based fluid model (Enhanced MPS), thus, the developed coupled solvers for fluid structure interaction (FSI) are referred to as Enhanced MPS-MPS and Enhanced MPS-HMPS. Besides, two smoothed particle hydrodynamics (SPH)-based FSI solvers, being developed by the authors, are considered and their potential applicability and comparable performance are briefly discussed in comparison with MPS-based FSI solvers. The SPH-based FSI solvers are established through coupling of projection-based incompressible SPH (ISPH) fluid model and SPH-based Newtonian/Hamiltonian structure models, leading to Enhanced ISPH-SPH and Enhanced ISPH-HSPH. A comparative study is carried out on the performances of the FSI solvers through a set of benchmark tests, including hydrostatic water column on an elastic plate, high speed impact of an elastic aluminum beam, hydroelastic slamming of a marine panel and dam break with elastic gate.