Modeling and simulations for fluid and rotating structure interactions
Document Type
Article
Publication Date
1-1-2016
Publication Title
Computer Methods in Applied Mechanics and Engineering
Volume
311
First page number:
788
Last page number:
814
Abstract
In this paper, we study a dynamic fluid–structure interaction (FSI) model for an elastic structure immersed and spinning in the fluid. To describe the motion of a rotating elastic structure, we develop a linear constitutive model, that is suitable for the application of the arbitrary Lagrangian–Eulerian (ALE) method in FSI simulations. Additionally, a new ALE mapping method is designed to generate the moving fluid mesh while the deformable structure spins in a non-axisymmetric fluid channel. The structure velocity is adopted as the principle unknown to form a monolithic saddle-point system together with fluid velocity and pressure. Using the mixed finite element method and Newton's linearization, we discretize the nonlinear saddle-point system, and prove that the discrete saddle-point system is well-posed. The developed methodology is applied to a self-defined elastic structure and a realistic hydro-turbine under a prescribed angular velocity. Numerical validation is also conducted to demonstrate the accuracy of the models and the numerical methods. © 2016 Elsevier B.V.
Keywords
Arbitrary Lagrangian Eulerian (ALE) method; Fluid-rotating structure interaction; Linear elasticity; Master–slave relations; Mixed finite element method; Monolithic algorithm
Language
English
Repository Citation
Yang, K.,
Sun, P.,
Wang, L.,
Xu, J.,
Zhang, L.
(2016).
Modeling and simulations for fluid and rotating structure interactions.
Computer Methods in Applied Mechanics and Engineering, 311
788-814.
http://dx.doi.org/10.1016/j.cma.2016.09.020