A Chimera technique for moving grids is applied to simulate the transport of large-scale vortices convected by a mean velocity field over large distances and their interaction with an airfoil. While keeping the numerical dissipation at a minimum, the Chimera approach allows to resolve the vortex on a local fine grid whereas the unstructured global background grid can be relatively coarse. Having examined the vortex dissipation rate numerically, the interaction of a Rankine-like type vortex with a NACA 0012 airfoil and an ONERA-A airfoil near stall, respectively, is simulated. The interaction can be interpreted as a time-dependent variation in the effective angle of attack. A subsequent computation of a flapping NACA 0012 airfoil turns out to be an insufficient approximation of the vortex-airfoil interaction. © 2010 Springer-Verlag Berlin Heidelberg.
CITATION STYLE
Wolf, C., Raichle, A., Knopp, T., & Schwamborn, D. (2010). Chimera simulations of transported large-scale vortices and their interaction with airfoils. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 112, 117–124. https://doi.org/10.1007/978-3-642-14243-7_15
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