VOFTools 5: An extension to non-convex geometries of calculation tools for volume of fluid methods

gVOF: An open-source package for unsplit geometric volume of fluid methods on arbitrary grids

“…In this work, the CIBRAVE (coupled interpolation-bracketed analytical volume enforcement) method of López et al [48] is generally used to compute C, except when using grids with rectangular parallelepiped cells, for which the efficient analytical method of Scardovelli and Zaleski [49] is used. The implementation of these two volume conservation enforcement methods is included in the VOFTools package [50][51][52].…”

“…( 1) are presented (a brief description of each one is summarized in Table 1). It must be mentioned that gVOF requires the VOFTools v5 [45,52] and isoap [54,57] external libraries. For the sake of brevity, the calling convection and the list of input and output parameters for each routine described hereafter, as well as others auxiliary routines not mentioned here, are left to be provided in the user manual included in the supplied software package.…”

“…The initfgrid routine has been implemented to initialize the fluid volume in the grid cells using an accurate refinement procedure [7,45,52], which allows to obtain the volume fraction of the fluid contained in a convex or non-convex polyhedral cell. The shape of the fluid interface is defined by implicit external functions.…”

“…The NIFPA-1 method isoAdvector-plicRDF gVOF (FMFPA, CLCIR) gVOF (FMFPA, SWIR) proposed by Ivey and Moin [40] combined with the embedded height-function method proposed also by Ivey and Moin [9] provides accuracies comparable to those of other advanced geometric unsplit VOF methods. Although, as it was mentioned, the results of t cpu included in the table should only be considered as a qualitative reference, one of the reasons for the clear advantage of gVOF with respect to others in terms of computational efficiency, is the use of the non-convex version of VOFTools [45,52], which avoids the use of costly techniques to decompose the generally non-convex flux polyhedra into convex sub-polyhedra. Fig.…”

Numerical Modelling of Variability in Liquid Impacts

“…The resulting polyhedron is in general no longer convex, and therefore the authors of [101] propose a tetrahedralisation of the non-convex polyhedron such that routines suitable only for convex polyhedra can be used to perform the intersection of the DR with the neighbouring fluid. We use the VOFTools 5 toolbox [88], which was kindly provided to us by its authors. This toolbox is able to perform non-convex polyhedron intersections and therefore we do not need to tetrahedralise our polyhedron prior to intersection.…”