Development of Surface-Volume Tracking Method Based on MARS

The MARS (Multi-interfaces Advection and Reconstruction Solver) [1] is one of the direct numerical methods for multiphase flow solvers with a volume tracking procedure for free surface or interface deformation. The main feature of the MARS is 1) a precise conservation of volume of fluid (VOF), 2) a surface-volume tracking procedure with a precise linear interface calculation and 3) a representation of the interface/surface within one or two control volumes. Since this method has been developed on a staggered structuregrid system, it is difficult to perform the computation with high accuracy in a complicated computational domain. Therefore, it is necessary to develop a new version of the MARS on the unstructured grid system. In this study, a new version of the MARS based on collocated structure-grid system has been developed. In order to validate this procedure, the well-known as the “Dam breaking problem” was chosen and unmerically solved. On the other hand, the experiments of this problem with the same configuration of the solution domain as the numerical simulation were conducted, and the numerical and experimental results were compared with each other.