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Coupled CFD and Structural Solver for Flapping Wing Simulations
A fluid structure interaction modeling tool is developed for the simulation of thrust generation using flexible flapping wings. Three models are developed by coupling the computational fluid dynamics (CFD) solver with different computational structural dynamics (CSD) solvers. The first model, a coupled solver based on eigenmodes is validated using the well-known Turek-Hron benchmark problem. The second model, a coupled solver for membrane cases is developed and tested for 2-D flow cases at various angles of attack and compared with results in the literature. The third model, a comprehensive structural solver coupled to the CFD solver is developed and tested for a flapping wing comprised of carbon fiber spars with mylar membrane between them. Several parametric studies are performed for this configuration varying the stroke amplitude and flapping frequency of the wing.
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