Coupled THINC and level set method: a conservative interface capturing scheme with arbitrary-order surface representations

Abstract

In this paper, we propose a simple and accurate numerical method for capturing moving interfaces on fixed Eulerian grids by coupling the Tangent of Hyperbola Interface Capturing (THINC) method and Level Set (LS) method. The innovative and practically-significant aspects of the proposed method, so-called THINC/LS method, lie in (1) representing the interface with polynomial of arbitrary-order rather than the plane representation commonly used in the Piecewise Linear Interface Calculation (PLIC) Volume of fluid (VOF) methods, (2) conserving rigorously the mass of the transported VOF field, and (3) providing a straightforward and easy-to-code algorithm for implementation. We verified the proposed scheme with the widely used benchmark tests. Numerical results show that this new method can obtain arbitrary-order accuracy for interface reconstruction and can produce more accurate results than the classical VOF methods.

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