1. Provably second-order time-accurate loosely-coupled solution algorithms for transient nonlinear computational aeroelasticity
- Author
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Farhat, Charbel, van der Zee, Kristoffer G., and Geuzaine, Philippe
- Subjects
- *
AEROELASTICITY , *UNSTEADY flow (Aerodynamics) , *ALGORITHMS , *STRUCTURAL dynamics - Abstract
Abstract: A methodology for designing formally second-order time-accurate and yet loosely-coupled partitioned procedures for the solution of nonlinear fluid–structure interaction (FSI) problems on moving grids is presented. Its key components are a fluid time-integrator that is provably second-order time-accurate on moving grids, the midpoint rule for advancing in time the solution of the structural dynamics equations of motion, a second-order structure predictor for bypassing the inner-iterations encountered in strongly-coupled solution procedures, and a carefully designed algorithm for time-integrating the motion of the fluid-mesh. Following this methodology, two different loosely-coupled schemes are constructed for the solution of transient nonlinear FSI problems and proved to be second-order time-accurate. Three-dimensional numerical results pertaining to the simulation of the aeroelastic response to a gravity excitation of a complete F-16 configuration are also presented. In addition to confirming the theoretical results discussed in this paper, these numerical results highlight a very stable behavior of the designed loosely-coupled partitioned procedures. [Copyright &y& Elsevier]
- Published
- 2006
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