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Smoke Surfaces: An Interactive Flow Visualization Technique Inspired by Real-World Flow Experiments

Summary: Smoke Surfaces: An Interactive Flow Visualization Technique
Inspired by Real-World Flow Experiments
Wolfram von Funck, Tino Weinkauf, Holger Theisel, and Hans-Peter Seidel
Abstract--Smoke rendering is a standard technique for flow visualization. Most approaches are based on a volumetric, particle
based, or image based representation of the smoke. This paper introduces an alternative representation of smoke structures: as
semi-transparent streak surfaces. In order to make streak surface integration fast enough for interactive applications, we avoid
expensive adaptive retriangulations by coupling the opacity of the triangles to their shapes. This way, the surface shows a smoke-like
look even in rather turbulent areas. Furthermore, we show modifications of the approach to mimic smoke nozzles, wool tufts, and
time surfaces. The technique is applied to a number of test data sets.
Index Terms--Unsteady flow visualization, streak surfaces, smoke visualization.
Flow visualization is an active field of research. A variety of tech-
niques for the interactive exploration of flow phenomena has been de-
veloped. One approach is to resemble well-accepted techniques from
experimental flow visualization. Among them, smoke visualization
plays an important role: in a real flow of gases, smoke is advected
and its temporal behavior gives information about the flow. Often, the
smoke is advected from line structures (e.g., from a burning stick),
or it is inserted from certain points (smoke nozzles). Another com-
mon technique in experimental flow visualization are wool tufts where


Source: Andrzejak, Artur - Konrad-Zuse-Zentrum für Informationstechnik Berlin


Collections: Computer Technologies and Information Sciences