Level Set and Volume of Fluid Coupled Method for Violent Two-phase Flows
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In this paper, a fully coupled level set and volume of fluid (CLSVOF) method for unstructured meshes is implemented in OpenFOAM. The interface is reconstructed by the piecewise-linear interface calculation (PLIC) method, where the interface normal is given by the level set method. A reinitialization algorithm suitable for unstructured meshes is employed to maintain the signed distance property of the level set function. Besides, the surface tension is instead calculated by the continuous level set function. The CLSVOF method is validated on two-dimensional and three-dimensional dam break benchmark cases and achieves good agreements with experiments. Furthermore, the comparison with the algebraic VOF method demonstrates that the CLSVOF method can obtain a sharper interface and significantly reduce spurious velocities, both of which are helpful for simulating violent two-phase flows.
