Constructing material interfaces from data sets with volume-fraction information
K.S. Bonnell, Daniel R. Schikore, Kenneth I. Joy, Mark A. Duchaineau, Bernd Hamann · University of North Texas Digital Library (University of North Texas) · 2000
We present a new algorithm for material boundary interface recon-struction from data sets containing volume fractions. We transform the reconstruction problem to a problem that analyzes the dual data set, where each vertex in the dual mesh has an associated barycen-tric coordinate tuple that represents the fraction of each material present. After constructing the dual tetrahedral mesh from the orig-inal mesh, we construct material boundaries by mapping a tetrahe-dron into barycentric space and calculating the intersections with Voronoi cells in barycentric space. These intersections are mapped back to the original physical space and triangulated to form the boundary surface approximation. This algorithm can be applied to any grid structure and can treat any number of materials per ele-ment/vertex.