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Hi together, There have been several questions about impeller and pump design with CAESES which is the reason for putting together the following brief summary: CAESES is used by several major pump makers (KSB, Ebara, Grundfos, DMW), mostly in the context of impeller and volute/casing optimization. In the context of turbocharger design, CAESES is used by e.g. MTU (large Diesel engines) for compressor and turbine optimization. There are free academic versions of the CAESES pro edition for students and PhD students as well as trial licenses, plus special editions for small companies, start-ups and freelancers. COMPARISON TO OTHER TOOLS Compared to other design tools on the market, CAESES focuses on automated design studies with your simulation tools. In most cases, there is already some sort of a baseline design that needs further optimization. Based on this design, a parametric CAESES model is created and automated. The possibilities for customization and shape fine-tuning are massive, so that specialized (company-specific) design processes can be completely defined in CAESES. No black box models etc. This is one important key issue, i.e., flexibility and full customization - besides the fact of having a 100% robust variable geometry for automated processes. IMPELLER BLADES There is functionality for creating parametric impeller blades (meridional contour definition, mapping from 2D onto 3D stream surfaces), which can also include analysis and optimization of the channel areas etc. See the turbomachinery section for more details. A water pump is described in this blog post. Any type of impeller can be parameterized, including complex shapes such as turbine scallops. VOLUTES Here is an overview with some animations. Basically, CAESES focuses on robust modeling of any volute type (in particular: turbochargers, pumps). Design constraints can also be built into the model, as well as typical controls (A/R distribution etc). The more complex your volute is, and the more problems you have to create new design candidates (automated), the more you should consider trying out CAESES. CFD AUTOMATION CAESES users also integrate their CFD and preliminary design tools. With this, a new design candidate can immediately be analyzed, directly within the CAESES GUI. Any open source, in-house or commercial tool can be coupled. You just need a batch mode for these tools. Excel sheets can also be accessed. For CFD analysis, the flow domain can be directly derived from the parametric impeller geometry. There is a CAESES ACT app available, to integrate CAESES into the ANSYS Workbench and to run optimizations with e.g. OptiSLang. MORE MATERIAL I recommend to browse through this page. Please find also attached a related presentation from the FRIENDSHIP SYSTEMS Users' Meeting 2013. I also added some related pics and animations. Unfortunately, it is not that easy to show more material since most data is confidential. Anyway, I hope this post helps a bit in terms of a quick overview. Cheers Joerg LAST UPDATE JULY 2019 UM2013-07-klemm-diffuser-design-for-multistage-pumps-with-FFW.pdf