b'Engineer Innovation | Power & Energycombination of fluid and solid volume in one cell with a resolution of the fluid/solid boundary allows for an effective, automated meshing of complex CAD geometries with minimal user input. The automated mesh generation, including the fluid volume detection, was completed in eight hours on a regular computer-aided design (CAD) workstation. (Figure 3 a, b). Solving this problem took around four days of computational efforts and included six rotor revolutions in transient mode with sliding rotation physical model. For the very first time in their practice of simulating full scale turbogenerators, Siemens simulation engineers were able to review the full simulation results of the whole complex machine including all sections. This would Figure 5: Test bench and measurement sensors usually be achieved with the necessity of extremely simplifying CAD and Since the complete manufacturingsimulation models with a significant model from Teamcenter was used, anumber of implied assumptions and the few geometrical preparations wereresulting CFD simulation would be necessary, for example closing gaps forunreliable.welding seams and screw holes to ensure an appropriate simulation modelFurther improvements could include an was achieved. The manual efforts foracceleration of the CAD preparation, defining the physical simulation modelmostly from a designers perspective. and mesh took about two man-days inFurthermore, more specific areas of total. In Simcenter FLOEFD all boundaryinterest could be analyzed, such as the conditions are applied to the CADgas outlet area. geometry directly which enables a very short graphical user interface (GUI)Subsequently, a detailed validation of interaction time for the user. Localthe results was carried out with aid of refinement of the mesh was onlySiemens remarkable test bed, where applied in particular local regions suchreal machine data was obtained as small gaps and areas of highthrough physical tests. gradients to further reduce the overall computational efforts for the user. TheThe measurements included more than final computational mesh consisted of30 kiel probes, 40 static pressure 14.5 million cells. Simcenter FLOEFDsprobes, 40 temperature sensors, and 12 SmartCells, a feature that introduces aspecially customized seven-hole probes. multi control volume approach with aSome of these sensors were Gas Pressure Distribution Measurement [Pa] 0.12 0.24 0.36 0.48 0.60 0.72 0.84 0.96Figure 6: Static pressure measurement and simulation14'