Multiresolution streamline placement based on control grids
Integrated Computer-Aided Engineering
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In this paper, a visualization method for unsteady incom- pressible flows is presented. Flow variations are illustrated by animating a sequence of evenly-spaced streamline im- ages. An interpolation scheme based on special Navier- Stoke equations is utilized to interpolate flow fields in the time domain. Thus temporal resolutions are increased and smooth streamline animations are guaranteed. To create the evenly-spaced streamline images, a hierarchy of regular grids is super-imposed upon the domain. The grids are used in seeding and controlling the separating distances between streamlines. The time step size in the streamline integra- tion is adaptively adjusted by using streamline curvatures and speeds such that streamlines will not diverge and fewer samples are computed.