Author(s)

R. Liebe

Abstract

This paper focusses on the salient features and applications of the \“Finite Vortex Model” (FVM) [3]. This model simulates the coupled dynamics of an oscillating airfoil (AF) in still or moving fluids. First concept and experimental FVMvalidation dates back to 1963 [2]; it is based on observations in nature. After recent extensions and validation [3], [5], [12], it proved to be an effective tool for many applications in nature and engineering. After presenting the basic mechanisms, the formation of the \“finite edge vortex” (FEV) and its dynamic interaction with the AF, first the FVM is applied to nature: flapping flight, swimming. Particular attention is drawn to the active attachment phase; subsequently detaching periodic FEVs are forming a typical \“ladder wake”. Then sample FVM-analyses are given of the jet characteristics of a plunging AF [1]. Typical D- and T-vortex patterns do not coi

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