Affiliation of Author(s):航空学院
Journal:Comput. Fluid Dyn. Conf.
Abstract:In this work, a previously developed immersed boundary method, in particular, a local domain-free discretization (DFD) method, has been extended to simulate fluid-structure interaction (FSI) of both rigid and flexible bodies. The local DFD method is based on unstructured grids and is amenable to local mesh refinement and mesh adaptation. For the FSI simulations, the partitioned fluid and solid solvers are combined in a strong-coupling manner at each time step through iterations, and a predictor-corrector approach is developed to accelerate convergence and reduce cost of the implicit coupling. Specifically, physics-based predictors with lower computational cost are used in place of full flow and solid solvers to perform FSI iterations, while the full solvers are only used for the correction step. The general framework of this coupling approach is flexible so that it is not limited to the individual flow and solid solvers used in the current study and can be applied to couple many existing packages. In addition, various predictors could be used and other acceleration approaches, e.g., Aitken relaxation and explicit extrapolation, may be combined into the framework. We have applied this coupling approach to both rigid and elastic bodies with low mass ratios, where the added mass effect is strong, to demonstrate its accuracy and efficiency. © 2017, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
Translation or Not:no
Date of Publication:2017-01-01
Co-author:Luo, Haoxiang