Adaptive methods for the simulation of multiscale fluid dynamic phenomena using vortex particle methods with applications to civil structures
Document typeConference report
Rights accessOpen Access
Wind effects on long-span bridges and slender buildings constitute a major criterion during the design phase. These effects are very important in certain cases, be- cause they can lead to strong dynamic excitations of the structure and in some cases also to its failure. The shape optimazation often requires the usage of devices such as guide-vanes to enhance a passive flow control in order to reduce those excitations. De- spite of their reduced dimensions, they often have a large influence on the entire flow field around the structure. It is then necessary to resolve the small scale fluid features that they generate. Vortex Particle Methods are successfully employed to study these phenomena. These methods consider a discrete number of mutual interacting vorticity- carrying particles to represent the continuous fluid domain. The boundary conditions are imposed by the Boundary Element Method approach which gives the advantage of a grid free Lagrangian formulation of the incompressible Navier-Stokes equations and a natural representation of the vortex creation process which is inherent in bluff body flows. This paper presents an adaptive scheme, the aim of which is the resolution of the small scale flow features in some regions by controlling the spatial and the temporal discretization of the problem of interest.
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