The M-Star Pre-Processor is the main Graphical User Interface (GUI) used to setup simulations.
M-Star CFD uses an immersed boundary algorithm and does not need manual meshing of complex internal volumes. Existing CAD files (IGS,STL) are be used to define geometries. Typically these files come from other CAD software, such as AutoCAD, SolidWorks, and others. The geometry files are exported from the CAD tool, and imported directly into M-Star CFD.
When a simulation is prepared, M-Star CFD automatically creates the necessary surface meshes which define the original geometry. These geometries are then used by the solver to define static and moving boundaries.
Compare the above approach with the conventional CFD process. Conventional processes usually require weeks (or more!) of man hours to create internal volume meshes. This problem is then compounded with other constraints such body motion, turbulence model selection, order of accuracy, grid sensitivity, etc. Meshless workflow is a game changer.