Abstract
The Vofi library has been developed to accurately calculate the volume fraction field demarcated by implicitly-defined fluid interfaces in Cartesian grids with cubic cells. The method enlists a number of algorithms to compute the integration limits and the local height function, that is the integrand of a double Gauss–Legendre integration with a variable number of nodes. Tests in two and three dimensions are presented to demonstrate the accuracy of the method and are provided in the software distribution with C/C++ and FORTRAN interfaces. Program summaryProgram title:VofiCatalogue identifier: AEYT_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEYT_v1_0.htmlProgram obtainable from: CPC Program Library, Queen’s University, Belfast, N. IrelandLicensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.htmlNo. of lines in distributed program, including test data, etc.: 94963No. of bytes in distributed program, including test data, etc.: 1679223Distribution format: tar.gzProgramming language: C, with C++ and FORTRAN interfaces.Computer: Any computer with a C compiler.Operating system: Tested on x86 with Linux (openSUSE 13.1, Ubuntu 12.04) and Mac OS X.Has the code been vectorized or parallelized?: The code does not need any change to be used in parallel with domain decomposition, as done for example in the Paris-Simulator code, http://parissimulator.sf.net, that is massively parallel and uses the Vofi library.Word size: 64 bitsClassification: 4.11.Nature of problem: The library computes the volume fraction of a cubic grid cell cut by an interface described by an implicit function.Solution method: The library computes the integration limits along two coordinate directions and the local height function, that is the integrand of a double Gauss–Legendre integration with a variable number of nodes.Restrictions: Cartesian grids with cubic cells.Running time: Fractions of a second for a grid cell cut by the interface.
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