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TCFD® - Input geometry

This chapter mainly deals with requirements for input data and its fundamental properties which have to be satisfied to get outstanding results with TCFD\textregistered workflow. Moreover, basic terminology for input mesh data and turbomachinery simulations are introduced.
Input TCFD
Figure above shows a simplified TCFD\textregisteredworkflow. It emphasizes that input geometry preparation is a separate process from TCFD\textregistered. It has significant influence on results quality; wrong input generates wrong result. Make always sure that your input geometry, either STL files or external meshes, has the best possible quality. The main quality parameters and common errors will be presented later on in this Section. Typically, the geometry is created or modified in some CAD software. Afterwards, TCFD\textregisteredusers have two basic options:
  1. Import the CAD geometry into some meshing program and generate the computation mesh. The resulting mesh (in *.msh format) can be directly imported into TCFD\textregistered.
  2. Generate and export STL geometry from the CAD software and import the STL geometry into TCFD\textregistered.
Users can decide which approach to follow. Those who are familiar and experienced with some meshing software can follow the option 1 and those who have no preferences can choose the option 2. Both ways usually starts from the CAD geometry. The next sections bring general requirements for CAD geometries.