Buerger, RaphaelMuigg, PhilippIlcík, MartinDoleisch, HelmutHauser, HelwigK. Museth and T. Moeller and A. Ynnerman2014-01-312014-01-312007978-3-905673-45-61727-5296https://doi.org/10.2312/VisSym/EuroVis07/171-178We present smooth formulations of common vortex detectors that allow a seamless integration into the concept of interactive visual analysis of flow simulation data. We express the originally binary feature detectors as fuzzy-sets that can be combined using the linking and brushing concepts of interactive visual analysis. Both interaction and visualization gain from having multiple detectors concurrently available and from the ability to combine them. An application study on automotive data reveals how these vortex detectors combine and perform in praxis.