Comparison of the VOF Methods with One and Two Fluids for Simulating the Free Surface Tracking Problem
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In this work, a numerical model has been developed for the 2D simulation of free surface flows. The front is tracked by the volume of fluid (VOF) method. This Eulerian approach in which the moving interface is advected through a fixed mesh eliminates any remeshing problem and has been developed for the finite volume method. In this study, two methods are presented: the Navier-Stokes equations are resolved in the whole domain (double-fluid algorithm: liquid and air), and in the domain containing liquid only (single-fluid algorithm). A broken dam problem is used to check on the capability of these numerical models and to compare with results reported in the literature. In order to demonstrate the effectiveness of the proposed numerical scheme, mold filling process was studied. Also, the proposed study exhibits interesting physical and numerical features in the way it raises a few questions.
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