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Interface Reconstruction in Multi-fluid Flow Simulations

Rao Garimella
Blair Swartz
Vortex Reconstruction

We have developed an advanced method for recovering a piecewise linear approximation of material interfaces in flow simulations given the volume fractions of materials in the cells of an unstructured mesh. The method incorporates several new techniques designed to make the reconstruction method more accurate (generally 2nd order), rapid and robust. These include the careful selection and use of interface neighbor cells, and a topological consistency checking and repair algorithm for the interface that is designed to minimize fragmentation of the material regions being reconstructed. The volume of the materials is conserved exactly in the method.