Freecad CfdOF can address a solver (“buoyantPimpleFoam”) that can calculate a compressible physics model, but test calculations showed that the solution will not converge. This video shows by comparing incompressible flow with compressible flow why a compressible physics model must be used to calculate the vibrational behaviour of an air column. The development of the model took a long time and was very complicated, but the result is impressive: The excitation and vibration behavior of an organ pipe can also be simulated with FreeCad CfdOF. Tutorial #9 von Karman vortex.FCStd (23.73 KiB) Downloaded 87 times I hope that my tutorials will make the CfdOF community even bigger and that more users will use this marvellous software. When I started with Freecad, many tutorials - especially the tutorials by r-frank, anisim and Pawel Lojek - helped me a lot. I really enjoyed recording these tutorials, I hope you enjoy watching them as well. Tutorials #8, #9 and #10 are advanced tutorials, they show how to set up a simulation with 2 phasis, a transient simulation and how to invoke a new solver (rhoPimpleFoam). These tutorials show the difference between a laminar flow and a turbulent flow, the use of boundary conditions and show how to add boundary conditions that are not given in the CfdOF Workbench itself. The tutorials #2 - #5 can be regarded as a verification of CFD, the results of the CFD-simulation are compared to analytical solutions. My objective was to record tutorials for advanced users and tutorials that provide a deeper understanding of the methods in CFD. Of course, there are a lot of real good tutorial. Thanks to the German “Kurzarbeit” (= short-time work) and Corona lockdown, I had time to record some tutorials about Freecad CfdOF. Please note that I recorded the tutorials before the change in 2D modelling. In order to keep the file size small, I deleted the mesh, so create the mesh before running the simulation. This workbench aims to help users set up and run CFD analyses within the FreeCAD modeller. The collection of tutorials can be seen here. CfdOF: A Computational fluid dynamics (CFD) workbench for FreeCAD.
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