Numerical simulation of vortex shedding flows past moving obstacles using the k-£ turbulence model on unstructured dynamic meshes
Keywords:
finite element/finite volume method, dynamix meshes, k-e turbulence model, vortex shedding flowsAbstract
>p>We consider the numerical solution on unstructured dynamic meshes of the averaged Navier-Stockes equations equipped with the k-e turbulence model and a wall function. We discuss discretization issues pertaining to moving grids and numerical dissipation, and present a robust spring analogy method for constructing dynamic meshes. We validate our implementation of this two-equation turbulence model and justify its usage for a class of vortex shedding problems by correlating our computational results with experimental data obtained for a flow past a square cylinder. We also apply our solution methodology to the twodimensional aerodynamic stability analysis of the Tacoma Narrows Bridge, and report nwnerical results that are in good agreemellt with observed data.
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