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An interface reconstruction method based on an analytical formula for 3D arbitrary convex cells
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DOI：10.1016/j.jcp.2015.10.011.png)
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Abstract
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In this paper, we are interested in an interface reconstruction method for 3D arbitrary convex cells that could be used in multi-material flow simulations for instance. We assume that the interface is represented by a plane whose normal vector is known and we focus on the volume-matching step that consists in finding the plane constant so that it splits the cell according to a given volume fraction. We follow the same approach as in the recent authors' publication for 2D arbitrary convex cells in planar and axisymmetrical geometries, namely we derive an analytical formula for the volume of the specific prismatoids obtained when decomposing the cell using the planes that are parallel to the interface and passing through all the cell nodes. This formula is used to bracket the interface plane constant such that the volume-matching problem is rewritten in a single prismatoid in which the same formula is used to find the final solution. The proposed method is tested against an important number of reproducible configurations and shown to be at least five times faster. (C) 2015 Elsevier Inc. All rights reserved.
Keywords:
Interface reconstruction
Arbitrary 3D convex cells
Analytical formula
VOF method
Non-iterative technique
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