One of postulates of the Industry 4.0 paradigm infers strengthening IT/industrial branches ties, more intensive digitization of business to improve its quality. One of attributes of the industrial revolution is the resulted rise in the number of such smart businesses. E.g., high performance computing in design phase permits input data processing for the creation of models of objects and processes in more limited time periods. Up-to-date software is capable to create digital analogs of real objects and processes using input data specified by a user, and simulate various environmental effects. One of such software instruments is the open source OpenFOAM software, successfully applied by engineers around the world for high performance computing and numerical simulation in the continuum mechanics (CM) field. Its main drawback (lack of the user's interface) is partially rectified by different groups of designers who have created their original interface versions. The author of the paper proposes his own approach for the problem solution given in 1. The problem of the graphical user interface (GUI) lack is also settled, since the original OpenFOAM software code is supplemented with new modules to provide users the access to new computing options, and this requires the extension of the interface original code. The paper is focused on components implemented in the interface that ensure the modification of mesh models to account for the great number of external factors and to finally get a more accurate numerical model.